Ticket #23829: get_the_content_fix.diff

wp-includes/category-template.php

@@ -72 +72 @@
  * @return array
  */
 function get_the_category( $id = false ) {
+        if( !$id ) {
+                global $post;
+                $id = $post->ID;
+        }
+
         $categories = get_the_terms( $id, 'category' );
         if ( ! $categories || is_wp_error( $categories ) )
                 $categories = array();