Fix off-by-one buglet

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4147 65c4cc65-6c06-0410-ace0-fbb531ad65f3

pbx/dundi-parser.c

@@ -117,6 +117,7 @@ static void dump_string(char *output, int maxlen, void *value, int len)
 
 static void dump_cbypass(char *output, int maxlen, void *value, int len)
 {
+	maxlen--;
 	strncpy(output, "Bypass Caches", maxlen);
 	output[maxlen] = '\0';
 }