Changed code to avoid warnings from visual studio.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403423

dlib/matrix/matrix.h

@@ -284,8 +284,7 @@ namespace dlib
         // The cost of evaluating an element of a matrix multiply is the cost of evaluating elements from
         // RHS and LHS times the number of rows/columns in the RHS/LHS matrix.  If we don't know the matrix
         // dimensions then just assume it is really large.
-        const static long cost = (lhs_cost+rhs_cost)*
-                                 ((tmax<LHS::NC,RHS::NR>::value!=0)? (tmax<LHS::NC,RHS::NR>::value):(10000));
+        const static long cost = ((tmax<LHS::NC,RHS::NR>::value!=0)? ((lhs_cost+rhs_cost)*tmax<LHS::NC,RHS::NR>::value):(10000));
     };
 
     template <typename T, bool is_ref> struct conditional_matrix_temp { typedef typename T::matrix_type type; };

dlib/test/empirical_kernel_map.cpp

@@ -64,7 +64,7 @@ namespace
                 double err;
 
                 // the samples in the basis should have zero projection error
-                for (int i = 0; i < samples.size(); ++i)
+                for (unsigned long i = 0; i < samples.size(); ++i)
                 {
                     ekm.project(samples[i], err);
                     DLIB_TEST_MSG(abs(err) < 1e-13, abs(err));