multisize

- New derivative method for PwgTemplateAdapter.
- add quotes to get_size_htm function.

git-svn-id: http://piwigo.org/svn/trunk@13170 68402e56-0260-453c-a942-63ccdbb3a9ee

include/template.class.php

@@ -899,6 +899,11 @@ class PwgTemplateAdapter
     return call_user_func_array('sprintf',  $args );
   }
 
+  function derivative($type, $img)
+  {
+    return new DerivativeImage($type, $img);
+  }
+
   function derivative_url($type, $img)
   {
     return DerivativeImage::url($type, $img);