o add missing $lang

o use of l10n_dec
  o normalize file header


git-svn-id: http://piwigo.org/svn/trunk@1932 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/include/functions.php

@@ -1465,8 +1465,8 @@ DELETE FROM '.$table.'
 
   array_push(
     $page['infos'],
-    sprintf(
-      l10n('%d categories moved'),
+    l10n_dec(
+      '%d category moved', '%d categories moved',
       count($categories)
       )
     );