} elseif (isSessionVariableSet('refid')) {
// Set session refid als global
$GLOBALS['refid'] = bigintval(get_session('refid'));
-} elseif (GET_EXT_VERSION("sql_patches") != "") {
+} elseif (GET_EXT_VERSION("sql_patches") != '') {
// Set default refid as refid in URL
$GLOBALS['refid'] = bigintval($_CONFIG['def_refid']);
} else {