proper check for useskin parameter

diff --git a/includes/SkinTemplate.php b/includes/SkinTemplate.php
index f973d77..d776fb8 100644 (file)
--- a/includes/SkinTemplate.php
+++ b/includes/SkinTemplate.php
@@ -969,7 +969,7 @@ class SkinTemplate extends Skin {
                if ( $wgUseSiteCss ) {
                        $query = "usemsgcache=yes&action=raw&ctype=text/css&smaxage=$wgSquidMaxage";
                        $skinquery = '';
-                       if (($us = $wgRequest->getVal('useskin', false)) !== false)
+                       if (($us = $wgRequest->getVal('useskin', '')) !== '')
                                $skinquery = "&useskin=$us";
                        $sitecss .= '@import "' . self::makeNSUrl( 'Common.css', $query, NS_MEDIAWIKI) . '";' . "\n";
                        $sitecss .= '@import "' . self::makeNSUrl( ucfirst( $this->skinname ) . '.css', $query, NS_MEDIAWIKI ) . '";' . "\n";