Menu items do not inherit their parent's load arguments

I just noticed some errors when using some local task menu items with extra load arguments defined. After some investigation, I found that these are generated independently of the parent menu items based on the items "load arguments" and the items defined path.

The attached patch adds a check to allow the menu items to inherit their parents arguments:

The error was generated by the following menu declarations:

<?php
  $items['projects/%project/job/%job'] = array(
    'title callback' => 'jm_page_title',
    'title arguments' => array(3),
    'load arguments' => array('%map', '%index'),
    'page callback' => 'jm_page_content',
    'page arguments' => array('job', 1, 3),
    'access arguments' => array('access job management system'),
    'type' => MENU_NORMAL_ITEM,
  );
  $items['projects/%project/job/%job/view'] = array(
    'title' => 'View job',
    'type' => MENU_DEFAULT_LOCAL_TASK, 
//    this would prevent the error
//    'load arguments' => array('%map', '%index'),
    'weight' => -10,
  );

// and one of the load callbacks
function job_load($nid, $map, $index) {
  $project = $map[1];
  if ($node = node_load(array('nid' => $nid))) {
    if ($node->status && $node->type == 'job' && $project->nid = $node->field_project[0]['nid'] && node_access('view', $node)) {
      return $node;
    }
  }
  return FALSE;
}

?>