Ticket #15460: 15460.patch

query.php

@@ -311 +311 @@
  *
  * @return bool
  */
-function is_feed() {
+function is_feed( $format = null ) {
         global $wp_query;
 
-        return $wp_query->is_feed();
+        return $wp_query->is_feed( $format );
 }
 
 /**
@@ -2938 +2938 @@
          *
          * @return bool
          */
-        function is_feed() {
-                return (bool) $this->is_feed;
+        function is_feed( $format ) {
+                if ( !$this->is_feed )
+                        return false;
+                else if ( $format )
+                        return ( $format === get_query_var( 'feed' ) );
+                else
+                        return true;
         }
 
         /**