Merged revisions 236981 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r236981 | tilghman | 2009-12-30 15:57:10 -0600 (Wed, 30 Dec 2009) | 9 lines
  
  Don't queue frames to channels that have no means to process them.
  (closes issue #15609)
   Reported by: aragon
   Patches: 
         20091230__issue16521__1.4__chan_local_only.diff.txt uploaded by tilghman (license 14)
   Tested by: aragon
   
  Review: https://reviewboard.asterisk.org/r/452/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@236982 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_local.c

@@ -257,7 +257,9 @@ static int local_queue_frame(struct local_pvt *p, int isoutbound, struct ast_fra
 	}
 
 	if (other) {
-		ast_queue_frame(other, f);
+		if (other->pbx || other->_bridge) {
+			ast_queue_frame(other, f);
+		} /* else the frame won't go anywhere */
 		ast_channel_unlock(other);
 	}