Ensure that empty translation data is handled properly

Files in question had no entity_translation data, which is a common occurrence.

Patch provided which at least to me fixes the issue without any harm.

The alternative would be to do this:

$values = !empty($keys) ? array_fill(0, count($keys), $hook_info) : array();

But it seems pointless to execute the else statement if the translation 'data' array is empty.

No. $file->translations does exist, it's just $file->translations['data'] is an empty array because it has no data (entity created prior to entity_translation). The problem is array_fill cannot be called to generate an empty array.

Hrm, I'm just not seeing that the code from #6 is even necessary, but I guess it can't hurt. For reference, this is the debug() output of a file from file_load() that has no entity translation records:

stdClass::__set_state(array(
   'fid' => '2',
   'uid' => '1',
   'filename' => 'Hello.txt',
   'uri' => 'public://Hello_0.txt',
   'filemime' => 'text/plain',
   'filesize' => '0',
   'status' => '1',
   'timestamp' => '1343687273',
   'type' => 'text',
   'rdf_mapping' => 
  array (
  ),
   'translations' => 
  stdClass::__set_state(array(
     'original' => NULL,
     'data' => 
    array (
    ),
  )),
))