Index: pbx.c
===================================================================
--- pbx.c	(revision 34128)
+++ pbx.c	(working copy)
@@ -932,7 +932,7 @@
 	else {	/* look in contexts */
 		tmp = NULL;
 		while ((tmp = ast_walk_contexts(tmp)) ) {
-			if (!strcmp(tmp->name, context))
+			if (context && !strcmp(tmp->name, context))
 				break;
 		}
 		if (!tmp)