Wrong callback "file_validate_image_resolution" at filefield_widget.inc Line 223

Wrong callback name causes error:
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'file_validate_image_resolution_help' was given in [...]/sites/all/modules/filefield/filefield_widget.inc on line 223.
Due to the error no image resolutuion help string is shown.

223 foreach ($element['#upload_validators'] as $callback => $arguments) {
224   $help_func = $callback .'_help';

Should be 'filefield_validate_image_resolution_help' instead of 'file_validate_image_resolution_help'

Is wiped out roughly by:

foreach ($element['#upload_validators'] as $callback => $arguments) {
  if ($callback == 'file_validate_image_resolution') {
    $callback = 'filefield_validate_image_resolution';
  }
$help_func = $callback .'_help';