Add some necessary hangup commands in the case that forwarding

a call fails

1) Hang up the original destination if the local channel cannot
   be requested.
2) Hang up the local channel (in addition to the original destination)
   if ast_call fails when calling the newly created local channel.

This prevents channels from sticking around forever in the
case of a botched call forward (e.g. to an extension which does not
exist).

(closes issue #13764)
Reported by: davidw
Patches:
      13764_v2.patch uploaded by putnopvut (license 60)
Tested by: putnopvut, davidw



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@159554 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_dial.c

@@ -735,6 +735,7 @@ static void do_forward(struct chanlist *o,
 	if (!c) {
 		ast_clear_flag64(o, DIAL_STILLGOING);
 		handle_cause(cause, num);
+		ast_hangup(original);
 	} else {
 		char *new_cid_num, *new_cid_name;
 		struct ast_channel *src;
@@ -762,6 +763,7 @@ static void do_forward(struct chanlist *o,
 			ast_log(LOG_NOTICE, "Failed to dial on local channel for call forward to '%s'\n", tmpchan);
 			ast_clear_flag64(o, DIAL_STILLGOING);
 			ast_hangup(original);
+			ast_hangup(c);
 			c = o->chan = NULL;
 			num->nochan++;
 		} else {