Add feed_id to subscribeToFeed response when the code is 1 or 0.

Set the API_LEVEL to 14.

classes/api.php

@@ -2,7 +2,7 @@
 
 class API extends Handler {
 
-	const API_LEVEL  = 13;
+	const API_LEVEL  = 14;
 
 	const STATUS_OK  = 0;
 	const STATUS_ERR = 1;

include/functions.php

@@ -1772,9 +1772,9 @@
 				set_basic_feed_info($feed_id);
 			}
 
-			return array("code" => 1);
+			return array("code" => 1, "feed_id" => $feed_id);
 		} else {
-			return array("code" => 0);
+			return array("code" => 0, "feed_id" => db_fetch_result($result, 0, "id"));
 		}
 	}