Fix cli matchstr initialization (bug #4958)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6326 65c4cc65-6c06-0410-ace0-fbb531ad65f3

cli.c

@@ -1251,7 +1251,7 @@ static char *__ast_cli_generator(char *text, char *word, int state, int lock)
 	char *dup, *res;
 	char fullcmd1[80] = "";
 	char fullcmd2[80] = "";
-	char matchstr[80];
+	char matchstr[80] = "";
 	char *fullcmd = NULL;
 
 	if ((dup = parse_args(text, &x, argv, sizeof(argv) / sizeof(argv[0])))) {