Mapsize paramter missing from mapProviderOpenStreetMap

Great module!

I found that I couldn't set the size of the static map from OpenStreetMap. The parameter was not being passed on, so I added the line "'size' => $settings['preset']['mapsize']," to the "build_Params" function in mapProviderOpenStreetMap.php. The function now looks like:

public function build_params(&$items, &$settings) {    
    $parameters = array(
      'show' => 1,
      'layer' => $settings['preset']['maptype'],
      'size' => $settings['preset']['mapsize'],
      'z' => 12,
    );

and it's good.