Revert r66934 (Removing wfLoadExtensionMessages() from everything). I disagree on principle...we branch extensions for this very reason. But people want trunk extensions compatible for several versions back, meh.

Widgets.php

@@ -182,6 +182,7 @@ function renderWidget ( &$parser, $widgetName ) {
 	try {
 		$output = $smarty->fetch( "wiki:$widgetName" );
 	} catch ( Exception $e ) {
+		wfLoadExtensionMessages( 'Widgets' );
 		return '<div class=\"error\">' . wfMsgExt( 'widgets-desc', array( 'parsemag' ), htmlentities($widgetName) ) . '</div>';
 	}