Store.php: phpunit: access to TYPO3_LOADED_EXT reports undefined index - wrapped with isset()

extension/qfq/qfq/store/Store.php

@@ -179,7 +179,8 @@ class Store {
             // If we are called through AJAX API (e.g. api/save.php), there is no TYPO3 environment.
             if (isset($_SERVER['SCRIPT_FILENAME'])) {
                 $pos = strpos($_SERVER['SCRIPT_FILENAME'], $relExtDir);
-                if ($pos === false) {
+                if ($pos === false && isset($GLOBALS['TYPO3_LOADED_EXT'][EXT_KEY]['ext_localconf.php'])) {
+
                     // probably: index.php - THERE should be a TYPO3 environment.
                     $config[SYSTEM_PATH_EXT] = dirname($GLOBALS['TYPO3_LOADED_EXT'][EXT_KEY]['ext_localconf.php']);
                 } else {