Made wfMsg('') and wfMsg(null) silently return <> as it did before r52503....

diff --git a/includes/MessageCache.php b/includes/MessageCache.php
index 458ec8f..351c65d 100644 (file)
--- a/includes/MessageCache.php
+++ b/includes/MessageCache.php
@@ -501,10 +501,9 @@ class MessageCache {
        function get( $key, $useDB = true, $langcode = true, $isFullKey = false ) {
                global $wgContLanguageCode, $wgContLang;
 
-               if ( !is_string( $key ) ) {
-                       throw new MWException( __METHOD__.': Invalid message key of type ' . gettype( $key ) );
-               } elseif ( $key === '' ) {
-                       throw new MWException( __METHOD__.': Invaild message key: empty string' );
+               if ( strval( $key ) === '' ) {
+                       # Shortcut: the empty key is always missing
+                       return '<>';
                }
 
                $lang = wfGetLangObj( $langcode );