fix channel walking problems from recent changes (bug #4494)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5883 65c4cc65-6c06-0410-ace0-fbb531ad65f3

app.c

@@ -1059,7 +1059,6 @@ int ast_app_group_match_get_count(char *groupmatch, char *category)
 		if (test && !regexec(&regexbuf, test, 0, NULL, 0))
 			count++;
 		ast_mutex_unlock(&chan->lock);
-		chan = ast_channel_walk_locked(chan);
 	}
 
 	regfree(&regexbuf);

manager.c

@@ -753,6 +753,7 @@ static int action_status(struct mansession *s, struct message *m)
 			ast_state2str(c->_state), bridge, c->uniqueid, idText);
 		}
 		ast_mutex_unlock(&s->lock);
+		ast_mutex_unlock(&c->lock);
 		if (!all)
 			break;
 		c = ast_channel_walk_locked(c);