Fix E_ERROR: Call to a member function delete() on a non-object in maintenance/clear_...

diff --git a/maintenance/clear_interwiki_cache.php b/maintenance/clear_interwiki_cache.php
index 8f6c2eb..3d1ea0e 100644 (file)
--- a/maintenance/clear_interwiki_cache.php
+++ b/maintenance/clear_interwiki_cache.php
@@ -31,7 +31,7 @@ class ClearInterwikiCache extends Maintenance {
        }
 
        public function execute() {
-               global $wgLocalDatabases;
+               global $wgLocalDatabases, $wgMemc;
                $dbr = wfGetDB( DB_SLAVE );
                $res = $dbr->select( 'interwiki', array( 'iw_prefix' ), false );
                $prefixes = array();