adding a missing PHP_FALIAS to imap_listsubscribed()

Author: Chuck Hagenbuch

ext/imap/imap.c

@@ -143,7 +143,8 @@ function_entry imap_functions[] = {
 	PHP_FE(imap_deletemailbox,	NULL)
 	PHP_FALIAS(imap_listmailbox,imap_list,	NULL)
 	PHP_FALIAS(imap_getmailboxes,imap_list_full, NULL)
-	PHP_FALIAS(imap_scanmailbox,imap_listscan,	NULL)
+	PHP_FALIAS(imap_scanmailbox,imap_listscan, NULL)
+	PHP_FALIAS(imap_listsubscribed,imap_lsub, NULL)
 	PHP_FALIAS(imap_getsubscribed,imap_lsub_full, NULL)
 	PHP_FE(imap_subscribe,		NULL)
 	PHP_FE(imap_unsubscribe,	NULL)