Ticket #4558: 4558.diff

category-template.php

@@ -158 +158 @@
 function in_category( $category ) { // Check if the current post is in the given category
         global $object_term_cache, $post, $blog_id;
 
+        if ( !is_numeric($category) ) {
+                $category = get_cat_ID($category);
+        }
+
         if ( isset( $object_term_cache[$blog_id][$post->ID]['category'][$category] ) )
                 return true;
         else