[BUGFIX] Loading sys_language records fails with MySQL 5.7

Fixes #11

Classes/Service/ConfigurationService.php

@@ -703,13 +703,12 @@ class ConfigurationService extends AbstractService {
 	 * @return array
 	 */
 	protected function narrowToUserLanguages(array $languages, BackendUserAuthentication $backendUser) {
-		if (!empty($backendUser) && !$backendUser->isAdmin()) {
-			/** @var SysLanguageService $sysLanguageService */
-			$sysLanguageService = $this->objectManager->get('SGalinski\Lfeditor\Service\SysLanguageService');
+		if ($backendUser !== NULL && !$backendUser->isAdmin()) {
+			$sysLanguageService = $this->objectManager->get(SysLanguageService::class);
 			foreach ($languages as $index => $languageFlag) {
 				$sysLanguageId = $sysLanguageService->getSysLanguageIdByFlag($languageFlag);
 				if ($languageFlag === 'default'
-					|| $sysLanguageId !== NULL && $backendUser->checkLanguageAccess($sysLanguageId)
+					|| ($sysLanguageId !== NULL && $backendUser->checkLanguageAccess($sysLanguageId))
 				) {
 					continue;
 				}

Classes/Service/SysLanguageService.php

@@ -53,8 +53,9 @@ class SysLanguageService extends AbstractService {
 			'uid, title, flag',
 			'sys_language',
 			($uids !== NULL ? 'uid IN (' . $typo3Db->cleanIntList($uids) . ')' : ''),
-			'flag ASC'
+			'flag, uid'
 		);
+
 		$sysLanguageList = [];
 		while ($row = $typo3Db->sql_fetch_assoc($res)) {
 			$sysLanguageList[$row['flag']]['uid'] = $row['uid'];