Index: trunk/Ohana/src/opihi/dvo/dmt.c
===================================================================
--- trunk/Ohana/src/opihi/dvo/dmt.c	(revision 3462)
+++ trunk/Ohana/src/opihi/dvo/dmt.c	(revision 4689)
@@ -20,6 +20,7 @@
   if (!InitPhotcodes ()) return (FALSE);
 
+  vec1 = vec2 = vec3 = vec4 = vec5 = NULL;
   SaveVectors = FALSE;
-  if (N = get_argument (argc, argv, "-vect")) {
+  if ((N = get_argument (argc, argv, "-vect"))) {
     remove_argument (N, &argc, argv);
     if ((vec1 = SelectVector ("dmtdmt", ANYVECTOR, TRUE)) == NULL) return (FALSE);