Defining $post as a global variable (#4)

extended-toc.php

@@ -375,7 +375,8 @@ if( !class_exists('ExToC') ) {
       
       // we didn't find any markup...
       if( $pos === false ) {
-        // There was no markup, so insert at top or return original if this type does not need a ToC
+          global $post;
+          // There was no markup, so insert at top or return original if this type does not need a ToC
         if( !in_array(get_post_type($post), $this->options['auto_insert_post_types']) )
           return $content;
         else