removed inappropriate assert

dlib/cuda/tensor_tools.cpp

@@ -102,7 +102,6 @@ namespace dlib { namespace tt
 #ifdef DLIB_USE_CUDA
         cuda::scale_columns(out, m, v);
 #else
-        DLIB_CASSERT(false, "shouldn't be called right now");
         out = scale_columns(mat(m), mat(v));
 #endif
     }

dlib/test/dnn.cpp

@@ -597,6 +597,20 @@ namespace
 #endif
         }
 
+        {
+            const int nr = 5;
+            const int nc = 6;
+            tensor_rand rnd;
+            resizable_tensor out1(nr,nc), m(nr,nc), v(nc), out2;
+            rnd.fill_uniform(out1);
+            rnd.fill_uniform(m);
+            rnd.fill_uniform(v);
+
+            tt::scale_columns(out1, m, v);
+            out2 = scale_columns(mat(m), mat(v));
+            DLIB_TEST(max(abs(mat(out1)-mat(out2))) < 1e-6);
+        }
+
         {
             resizable_tensor A, B;
             A.set_size(11);