Show faces wrong working

If you choose hide show faces in static and dynamic admin setting either it doesn't make any change in the output.
Before:

  $form['fblikebutton_dynamic_appearance']['fblikebutton_show_faces'] = array(
    '#type' => 'select',
    '#title' => t('Show faces in the box?'),
    '#options' => array('show' => t('Show faces'), 'hide' => t('Do not show faces')),
    '#default_value' => variable_get('fblikebutton_show_faces', 'true'),
    '#description' => t('Show profile pictures below the button. Only works if <em>Layout style</em> (found above) is set to <em>Standard</em> (otherwise, value is ignored).'),
  );

The "hide" parameter should have be "false"

After

  $form['fblikebutton_dynamic_appearance']['fblikebutton_show_faces'] = array(
    '#type' => 'select',
    '#title' => t('Show faces in the box?'),
    '#options' => array('show' => t('Show faces'), 'false' => t('Do not show faces')),
    '#default_value' => variable_get('fblikebutton_show_faces', 'true'),
    '#description' => t('Show profile pictures below the button. Only works if <em>Layout style</em> (found above) is set to <em>Standard</em> (otherwise, value is ignored).'),
  );