Changed the code so that gcc doesn't give warnings when supplied with the "-Wall -W"

combined warning option.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403015

dlib/matrix/matrix_utilities.h

@@ -721,13 +721,13 @@ namespace dlib
             typedef typename EXP::type type;
             typedef typename EXP::mem_manager_type mem_manager_type;
             template <typename M>
-            static type apply ( const M& m, long r, long c)
+            static type apply ( const M& m, long r, long )
             { return m(r,r); }
 
             template <typename M>
             static long nr (const M& m) { return std::min(m.nc(),m.nr()); }
             template <typename M>
-            static long nc (const M& m) { return 1; }
+            static long nc (const M& ) { return 1; }
         };
     };
 
@@ -1035,7 +1035,7 @@ namespace dlib
         const static long NC = 0;
         typedef typename memory_manager<char>::kernel_1a mem_manager_type;
         typedef T type;
-        static type apply (const T& val, long r, long c)
+        static type apply (const T& val, long , long )
         { return val; }
     };
 
@@ -1072,7 +1072,7 @@ namespace dlib
         const static long NC = NC_;
         typedef typename memory_manager<char>::kernel_1a mem_manager_type;
         typedef T type;
-        static type apply (const T& val, long r, long c)
+        static type apply (const T& val, long , long )
         { return val; }
     };
 
@@ -1106,7 +1106,7 @@ namespace dlib
         const static long NC = NC_;
         typedef typename memory_manager<char>::kernel_1a mem_manager_type;
         typedef T type;
-        static type apply ( long r, long c)
+        static type apply ( long , long )
         { return val; }
     };
 

dlib/std_allocator.h

@@ -79,7 +79,7 @@ namespace dlib
         //allocate but don't initialize num elements of type T
         pointer allocate (
             size_type num,
-            typename std_allocator<void,M>::const_pointer hint = 0
+            typename std_allocator<void,M>::const_pointer  = 0
         ) 
         {
             return (pointer) pool.allocate_array(num*sizeof(T));
@@ -101,7 +101,7 @@ namespace dlib
         }
 
         //deallocate storage p of deleted elements
-        void deallocate (pointer p, size_type num) 
+        void deallocate (pointer p, size_type ) 
         {
             pool.deallocate_array((char*)p);
         }

dlib/svm/kernel.h

@@ -336,7 +336,7 @@ namespace dlib
         }
 
         bool operator== (
-            const linear_kernel& k
+            const linear_kernel& 
         ) const
         {
             return true;

dlib/svm/sparse_kernel.h

@@ -288,7 +288,7 @@ namespace dlib
         }
 
         bool operator== (
-            const sparse_linear_kernel& k
+            const sparse_linear_kernel& 
         ) const
         {
             return true;

dlib/svm/svm.h

@@ -1475,7 +1475,7 @@ namespace dlib
             typename scalar_type
             >
         inline void optimize_working_pair (
-            const scalar_vector_type2& y,
+            const scalar_vector_type2& ,
             scalar_vector_type& alpha,
             const kernel_matrix_cache<K, sample_vector_type, scalar_vector_type2>& Q,
             const scalar_vector_type& df,

dlib/test/conditioning_class.h

@@ -149,7 +149,7 @@ namespace
             for (unsigned long i = 0; i < alphabet_size-1; ++i)
             {
                 test.increment_count(i);
-                unsigned long low_count, high_count, total_count;
+                unsigned long low_count = 0, high_count = 0, total_count = 0;
                 DLIB_TEST(test.get_range(i,low_count,high_count,total_count) == 1);
 
                 DLIB_TEST(high_count == low_count+1);
@@ -546,7 +546,7 @@ namespace
             {
                 if(!test.increment_count(i))
                     oom = true;
-                unsigned long low_count, high_count, total_count;
+                unsigned long low_count = 0, high_count = 0, total_count = 0;
 
                 if (!oom)
                 {

dlib/test/gui/main.cpp

@@ -263,7 +263,7 @@ class win : public drawable_window
 
     void tab_change (
         unsigned long new_idx,
-        unsigned long old_idx
+        unsigned long 
     )
     {
         tab_label.set_text(tabs.tab_name(new_idx));
@@ -298,7 +298,7 @@ class win : public drawable_window
     }
 
     void lb_double_click (
-        unsigned long idx
+        unsigned long 
     )
     {
         dlib::queue<unsigned long>::kernel_2a_c sel;
@@ -335,7 +335,7 @@ class win : public drawable_window
     }
 
 	static void try_this_junk2 (
-		void* param
+		void* 
 		)
 	{
 

dlib/test/kcentroid.cpp

@@ -46,7 +46,7 @@ namespace
         }
 
         bool operator== (
-            const unopt_sparse_linear_kernel& k
+            const unopt_sparse_linear_kernel& 
         ) const
         {
             return true;
@@ -69,7 +69,7 @@ namespace
         }
 
         bool operator== (
-            const unopt_linear_kernel& k
+            const unopt_linear_kernel& 
         ) const
         {
             return true;

dlib/test/lz77_buffer.cpp

@@ -509,7 +509,7 @@ namespace
 
 
 
-            unsigned long match_index, match_length;
+            unsigned long match_index = 0, match_length = 0;
             unsigned long lookahead_size_before = test.get_lookahead_buffer_size();
             unsigned long history_size_before = test.get_history_buffer_size();
             test.find_match(match_index,match_length,2);

dlib/unicode/unicode.cpp

@@ -49,7 +49,7 @@ namespace dlib
 
     template <int N> void wstr2ustring_t(const wchar_t *src, size_t src_len, ustring &dest);
 
-    template <> void wstr2ustring_t<4>(const wchar_t *src, size_t src_len, ustring &dest)
+    template <> void wstr2ustring_t<4>(const wchar_t *src, size_t , ustring &dest)
     {
         dest.assign((const unichar *)(src));
     }