fix for bug 7764.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@44982 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_gtalk.c

@@ -877,10 +877,11 @@ static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const
 	if(strchr(tmp->us, '/')) {
 		data = ast_strdupa((char *) tmp->us);
 		exten = strsep(&data, "/");
-		free(data);
 	} else
 		exten = tmp->us;
 	ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
+	if(data)
+		free(data);
 	ast_mutex_init(&tmp->lock);
 	ast_mutex_lock(&gtalklock);
 	tmp->next = client->p;