feature 1502: In template extensions admin page, change "Bound template" by "Bound theme".

Template extensions are now attached to all themes if nothing is selected in "bound theme" column.

git-svn-id: http://piwigo.org/svn/trunk@5434 68402e56-0260-453c-a942-63ccdbb3a9ee

include/template.class.php

@@ -223,7 +223,7 @@ class Template {
       }
 
       if ((stripos(implode('',array_keys($_GET)), '/'.$param) !== false or $param == 'N/A')
-        and ($thm == $theme)
+        and ($thm == $theme or $thm == 'N/A')
         and (!isset($this->extents[$handle]) or $overwrite)
         and file_exists($dir . $filename))
       {