Remove Previous, Number # of #, and Next text/links when only 1 item in slideshow

The fact that the slideshow doesn't recognize that sometime there is only one attached image and deal with that lead me to fix it, since it's trivially easy.

Here's the simple one-line (plus 1 endbracket) patch:

  	$output .= '<div class="header">';
+  if ($status['total'] > 1) {
 	$output .=   l(t('Previous'), $slideshow['url'], array('class' => 'previous'), 'slide='. $status['previous']) .' | ';
  	$output .=   t('Image !current of !total', array('!current' => '<span class="current">'. $status['current'] .'</span>', '!total' 
        => '<span class="total">'. $status['total'] .'</span>')) .' | ';
  	$output .=   l(t('Next'), $slideshow['url'], array('class' => 'next'), 'slide='. $status['next']);
+  }
  	$output .= '</div>';

Simply put: only if there is more than one item to display, put the text/links into the header.