Don't create a new NOOP_Translations object for every domain

l10n.patch

Index: wp-includes/l10n.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- wp-includes/l10n.php	(revision 21279)
+++ wp-includes/l10n.php	(revision )
@@ -493,10 +493,11 @@
  * @param string $domain
  * @return object A Translation instance
  */
+$noop_translation = new NOOP_Translations();
 function &get_translations_for_domain( $domain ) {
-	global $l10n;
+	global $l10n, $noop_translation;
 	if ( !isset( $l10n[$domain] ) ) {
-		$l10n[$domain] = new NOOP_Translations;
+		$l10n[$domain] = $noop_translation;
 	}
 	return $l10n[$domain];
 }
\ No newline at end of file