A few more minor changes to avoid problems with GCC 4.2.1

dlib/image_transforms/spatial_filtering.h

@@ -708,7 +708,7 @@ namespace dlib
                 // add in the new right side of the rect and subtract the old right side.
                 cur_sum = cur_sum + column_sum[c+width] - column_sum[c];
 
-                out[r][c] += cur_sum;
+                out[r][c] += static_cast<typename image_type2::type>(cur_sum);
             }
         }
     }

dlib/test/rand.cpp

@@ -175,7 +175,7 @@ namespace
             for (int i =0; i < 1000; ++i)
             {
                 DLIB_TEST(r.get_random_32bit_number() == r2.get_random_32bit_number());
-                DLIB_TEST(r.get_random_gaussian() == r2.get_random_gaussian());
+                DLIB_TEST(std::abs(r.get_random_gaussian() - r2.get_random_gaussian()) < 1e-15);
             }
         }
 

dlib/test/scan_image.cpp

@@ -407,7 +407,7 @@ namespace
             {
                 for (long c = 0; c < img.nc(); ++c)
                 {
-                    img[r][c] = 100*(rnd.get_random_double()-0.5);
+                    img[r][c] = static_cast<pixel_type>(100*(rnd.get_random_double()-0.5));
                 }
             }