Index: reactos/win32ss/gdi/eng/surface.c
===================================================================
--- reactos/win32ss/gdi/eng/surface.c	(revision 74352)
+++ reactos/win32ss/gdi/eng/surface.c	(working copy)
@@ -162,6 +162,7 @@
         {
             DPRINT1("Overflow calculating size: cjWidth %lu, cy %lu\n",
                     cjWidth, cy);
+            ASSERT(FALSE);
             return NULL;
         }