#172977 follow up patch by pwolanin: fix NOTICE in taxonomy_term_count_nodes

modules/taxonomy/taxonomy.module

@@ -788,7 +788,7 @@ function taxonomy_term_count_nodes($tid, $type = 0) {
   foreach (_taxonomy_term_children($tid) as $c) {
     $children_count += taxonomy_term_count_nodes($c, $type);
   }
-  return $count[$type][$tid] + $children_count;
+  return $children_count + (isset($count[$type][$tid]) ? $count[$type][$tid] : 0);
 }
 
 /**