--- deliantra/server/common/image.C	2007/03/14 00:04:58	1.20
+++ deliantra/server/common/image.C	2007/03/14 04:12:27	1.21
@@ -86,6 +86,8 @@
 faceinfo *
 face_info (faceidx idx)
 {
+  assert (0 < (faceidx)-1); // faceidx must be unsigned
+
   if (idx >= faces.size ())
     return 0;