Casts all text fields to string in case of null

Prevents sql errors on writing to database

html/typo3conf/ext/ter/class.tx_ter_api.php

@@ -965,19 +965,19 @@ class tx_ter_api
             'composerinfo' => json_encode($extensionInfoData->technicalData->composerInfo),
             'shy' => (int)$extensionInfoData->technicalData->shy,
             'dependencies' => serialize($dependenciesArr),
-            'createdirs' => $extensionInfoData->technicalData->createDirs,
+            'createdirs' => (string)$extensionInfoData->technicalData->createDirs,
             'priority' => $extensionInfoData->technicalData->priority,
-            'modules' => $extensionInfoData->technicalData->modules,
+            'modules' => (string)$extensionInfoData->technicalData->modules,
             'uploadfolder' => (int)$extensionInfoData->technicalData->uploadFolder,
-            'modifytables' => $extensionInfoData->technicalData->modifyTables,
+            'modifytables' => (string)$extensionInfoData->technicalData->modifyTables,
             'clearcacheonload' => (int)$extensionInfoData->technicalData->clearCacheOnLoad,
             'locktype' => $extensionInfoData->technicalData->lockType,
-            'authorname' => $extensionInfoData->metaData->authorName,
-            'authoremail' => $extensionInfoData->metaData->authorEmail,
-            'authorcompany' => $extensionInfoData->metaData->authorCompany,
+            'authorname' => (string)$extensionInfoData->metaData->authorName,
+            'authoremail' => (string)$extensionInfoData->metaData->authorEmail,
+            'authorcompany' => (string)$extensionInfoData->metaData->authorCompany,
             'codingguidelinescompliance' => $extensionInfoData->infoData->codingGuidelinesCompliance,
-            'codingguidelinescompliancenote' => $extensionInfoData->infoData->codingGuidelinesComplianceNote,
-            'loadorder' => $extensionInfoData->technicalData->loadOrder,
+            'codingguidelinescompliancenote' => (string)$extensionInfoData->infoData->codingGuidelinesComplianceNote,
+            'loadorder' => (string)$extensionInfoData->technicalData->loadOrder,
         ];
 
         // Update an existing or insert a new extension details record