don't print sub total for one page result

hi,

Sub total it's good functionality, but when view render has only one page, subtotal has the same data as total.
The sub total could be hidden.

this code works :
(file theme.inc, function template_preprocess_views_calc_table, line 163)

if($view->total_rows > $view->pager['items_per_page']) {
  $process_available = array('sub_totals', 'totals');  
}else{
  $process_available = array('totals');
  $vars['sub_totals'] = array(); //if don't set, error in template
}

and replace line 165

foreach (array('sub_totals', 'totals') as $process) {

by

foreach ($process_available as $process) {