Merged revisions 175187 via svnmerge from

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

........
  r175187 | jpeeler | 2009-02-12 11:57:10 -0600 (Thu, 12 Feb 2009) | 6 lines
  
  Fix crash in event of failed attempt to transfer to parking
  
  The peer may not necessarily exist, such as in the case of a transfer to 
  ParkAndAnnounce. In this case don't try to play a sound to it.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@175188 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/features.c

@@ -823,7 +823,8 @@ static int masq_park_call(struct ast_channel *rchan, struct ast_channel *peer, i
 	}
 
 	if ((args->pu = park_space_reserve(rchan, peer, args)) == NULL) {
-		ast_stream_and_wait(peer, "beeperr", "");
+		if (peer)
+			ast_stream_and_wait(peer, "beeperr", "");
 		return AST_FEATURE_RETURN_PARKFAILED;
 	}