Stop cli command completion with tabs

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@128201 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -14213,6 +14213,8 @@ static char *sip_show_channelstats(struct ast_cli_entry *e, int cmd, struct ast_
 			"       Lists all currently active SIP channel's RTCP statistics.\n"
 			"       Note that calls in the much optimized RTP P2P bridge mode will not show any packets here.";
 		return NULL;
+	case CLI_GENERATE:
+		return NULL;
 	}
 
 	if (a->argc != 3)