Index: trunk/Ohana/src/opihi/cmd.data/tvgrid.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/tvgrid.c	(revision 2598)
+++ trunk/Ohana/src/opihi/cmd.data/tvgrid.c	(revision 2843)
@@ -15,5 +15,5 @@
 
   Nimage = -1;
-  if (N = get_argument (argc, argv, "-n")) {
+  if ((N = get_argument (argc, argv, "-n"))) {
     remove_argument (N, &argc, argv);
     Nimage = atof (argv[N]);