trivial fix for an agi error when attempting to use EAGI on a dead/hungup channel, we now print an error that makes sense

given our removal of deadagi as an actual application.

(closes issue #12161)
Reported by: explidous
Patches:
      res_agi_12161.patch uploaded by juggie (license 24)
Tested by: juggie


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@106399 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_agi.c

@@ -2944,7 +2944,7 @@ static int eagi_exec(struct ast_channel *chan, void *data)
 	int readformat, res;
 
 	if (ast_check_hangup(chan)) {
-		ast_log(LOG_ERROR, "If you want to run AGI on hungup channels you should use DeadAGI!\n");
+		ast_log(LOG_ERROR, "EAGI cannot be run on a dead/hungup channel, please use AGI.\n");
 		return 0;
 	}
 	readformat = chan->readformat;