Fix erroneous hangup extension execution

ast_spawn_extension behaves differently from 1.4 in that hangups and extensions
that do not exist do not return an error, whereas in 1.6 it does. This is now 
taken into account so that the AST_FLAG_BRIDGE_HANGUP_RUN flag gets set
properly.

(closes issue #16106)
Reported by: ajohnson
Tested by: ajohnson


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@231095 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/features.c

@@ -3085,6 +3085,10 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 		while ((spawn_error = ast_spawn_extension(chan, chan->context, chan->exten, chan->priority, chan->cid.cid_num, &found, 1)) == 0) {
 			chan->priority++;
 		}
+		if (spawn_error && (!ast_exists_extension(chan, chan->context, chan->exten, chan->priority, chan->cid.cid_num) || ast_check_hangup(chan))) {
+			/* if the extension doesn't exist or a hangup occurred, this isn't really a spawn error */
+			spawn_error = 0;
+		}
 		if (found && spawn_error) {
 			/* Something bad happened, or a hangup has been requested. */
 			ast_debug(1, "Spawn extension (%s,%s,%d) exited non-zero on '%s'\n", chan->context, chan->exten, chan->priority, chan->name);
@@ -3101,7 +3105,7 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 				bridge_cdr = NULL;
 			}
 		}
-		if (chan->priority != 1 || !spawn_error) {
+		if (!spawn_error) {
 			ast_set_flag(chan, AST_FLAG_BRIDGE_HANGUP_RUN);
 		}
 		ast_channel_unlock(chan);