Minor changes to avoid compiler warnings.

dlib/dnn/trainer.h

@@ -705,7 +705,7 @@ namespace dlib
                                 test_steps_without_progress = 0;
                                 // Empty out some of the previous loss values so that test_steps_without_progress 
                                 // will decrease below test_iter_without_progress_thresh.  
-                                for (int cnt = 0; cnt < test_previous_loss_values_dump_amount+test_iter_without_progress_thresh/10 && test_previous_loss_values.size() > 0; ++cnt)
+                                for (unsigned long cnt = 0; cnt < test_previous_loss_values_dump_amount+test_iter_without_progress_thresh/10 && test_previous_loss_values.size() > 0; ++cnt)
                                     test_previous_loss_values.pop_front();
                             }
                         }
@@ -825,7 +825,7 @@ namespace dlib
                             steps_without_progress = 0;
                             // Empty out some of the previous loss values so that steps_without_progress 
                             // will decrease below iter_without_progress_thresh.  
-                            for (int cnt = 0; cnt < previous_loss_values_dump_amount+iter_without_progress_thresh/10 && previous_loss_values.size() > 0; ++cnt)
+                            for (unsigned long cnt = 0; cnt < previous_loss_values_dump_amount+iter_without_progress_thresh/10 && previous_loss_values.size() > 0; ++cnt)
                                 previous_loss_values.pop_front();
                         }
                     }
@@ -1281,8 +1281,8 @@ namespace dlib
         std::atomic<bool> updated_net_since_last_sync;
 
         bool sync_file_reloaded;
-        int previous_loss_values_dump_amount;
-        int test_previous_loss_values_dump_amount;
+        unsigned long previous_loss_values_dump_amount;
+        unsigned long test_previous_loss_values_dump_amount;
     };
 
 // ----------------------------------------------------------------------------------------

dlib/test/matrix2.cpp

@@ -27,12 +27,8 @@ namespace
 
     dlib::rand rnd;
 
-    void matrix_test (
+    void matrix_test1 (
     )
-    /*!
-        ensures
-            - runs tests on the matrix stuff compliance with the specs
-    !*/
     {        
         typedef memory_manager_stateless<char>::kernel_2_2a MM;
         print_spinner();
@@ -739,6 +735,13 @@ namespace
         }
 
 
+    }
+
+
+    void matrix_test2 (
+    )
+    {        
+        typedef memory_manager_stateless<char>::kernel_2_2a MM;
         {
             srand(423452);
             const long M = 10;
@@ -1145,7 +1148,8 @@ namespace
         void perform_test (
         )
         {
-            matrix_test();
+            matrix_test1();
+            matrix_test2();
         }
     } a;