Changed to suppress compiler warning and also make more general.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403475

dlib/test/opt_qp_solver.cpp

@@ -107,7 +107,7 @@ namespace
 
             for (int i = 0; i < 40; ++i)
             {
-                for (long dims = 2; dims < 6; ++dims)
+                for (long dims = 1; dims < 6; ++dims)
                 {
                     rs.add(do_the_test(dims, 1.0));
                 }
@@ -115,7 +115,7 @@ namespace
 
             for (int i = 0; i < 40; ++i)
             {
-                for (long dims = 2; dims < 6; ++dims)
+                for (long dims = 1; dims < 6; ++dims)
                 {
                     rs.add(do_the_test(dims, 5.0));
                 }

dlib/test/statistics.cpp

@@ -122,7 +122,7 @@ namespace
                         cov.add(vects.back());
 
                     }
-                    DLIB_TEST(cov.in_vector_size() == dims);
+                    DLIB_TEST(cov.in_vector_size() == (long)dims);
 
                     DLIB_TEST(equal(mean(vector_to_matrix(vects)), cov.mean()));
                     DLIB_TEST_MSG(equal(covariance(vector_to_matrix(vects)), cov.covariance()),
@@ -149,7 +149,7 @@ namespace
                             cov2.add(vects.back());
 
                     }
-                    DLIB_TEST((cov+cov2).in_vector_size() == dims);
+                    DLIB_TEST((cov+cov2).in_vector_size() == (long)dims);
 
                     DLIB_TEST(equal(mean(vector_to_matrix(vects)), (cov+cov2).mean()));
                     DLIB_TEST_MSG(equal(covariance(vector_to_matrix(vects)), (cov+cov2).covariance()),