Content types with field_image defined render incorrectly when no image is present

See #1382470: Content is right aligned for background information.

This theme applies special theming logic to any content type that contains a field named "field_image" regardless of the field type and regardless of whether or not the field is empty. The template.php file should be modified such that the logic is applied only if the field is populated, and only if the field is an "image" field.

Existing code in touchpro_preprocess_node():

  if (isset($vars['field_image'])) {
    $vars['classes_array'][] = 'node-imagefield';
  }

Recommended change:

  if (!empty($vars['field_image']) && 
        $vars['elements']['field_image']['#field_type'] == 'image') {
    $vars['classes_array'][] = 'node-imagefield';
  }