multi size:

- fix external imagick issues when rotation was required
- fix: derivative were generated continuosly until a first save performed in the admin screen
- added sharpen param in the new config screen
- increased the sharpen range (10% is less than before)

git-svn-id: http://piwigo.org/svn/trunk@14649 68402e56-0260-453c-a942-63ccdbb3a9ee

i.php

@@ -582,7 +582,7 @@ if ($d_size[0]*$d_size[1] < 256000)
   $image->strip();
 }
 
-$image->set_compression_quality( $params->quality );
+$image->set_compression_quality( ImageStdParams::$quality );
 $image->write( $page['derivative_path'] );
 $image->destroy();
 $timing['save'] = time_step($step);