[BUGFIX] fix typeError in hook

This commit fixes the following Exception: Argument 3 passed to SGalinski\SgMail\Hooks\ProcessDatamap::processDatamap_afterDatabaseOperations() must be of the type int, string given, called in /var/www/softingit.dev/web/typo3/sysext/core/Classes/DataHandling/DataHandler.php on line 855
The exception was thrown when creating a new translation of a page.

Classes/Hooks/ProcessDatamap.php

 <?php
+
+namespace SGalinski\SgMail\Hooks;
+
 /***************************************************************
  *  Copyright notice
  *
@@ -23,15 +26,17 @@
  *  This copyright notice MUST APPEAR in all copies of the script!
  ***************************************************************/
 
-namespace SGalinski\SgMail\Hooks;
-
 use TYPO3\CMS\Backend\Utility\BackendUtility;
 use TYPO3\CMS\Core\Database\ConnectionPool;
 use TYPO3\CMS\Core\DataHandling\DataHandler;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Core\Utility\MathUtility;
 
 /**
+ * Class ProcessDatamap
  * Hooks for synchronize urls directly on-the-fly while editing
+ *
+ * @package SGalinski\SgMail\Hooks
  */
 class ProcessDatamap {
 
@@ -40,12 +45,14 @@ class ProcessDatamap {
 	 *
 	 * @param string $status
 	 * @param string $table
-	 * @param int $id
+	 * @param int|string $id
 	 * @param array $fieldArray
 	 * @param DataHandler $dataHandler
 	 * @return void
 	 */
-	public function processDatamap_afterDatabaseOperations(string $status, string $table, int $id, array $fieldArray, DataHandler $dataHandler): void {
+	public function processDatamap_afterDatabaseOperations(
+		string $status, string $table, $id, array $fieldArray, DataHandler $dataHandler
+	): void {
 		if (
 			$table === 'tx_sgmail_domain_model_layout' && isset($fieldArray['default']) &&
 			in_array($status, ['update', 'new'], TRUE)
@@ -65,7 +72,10 @@ class ProcessDatamap {
 				if ((int) $fieldArray['sys_language_uid'] > 0) {
 					return;
 				}
-				$id = (int) $dataHandler->substNEWwithIDs[$id];
+
+				if (!MathUtility::canBeInterpretedAsInteger($id)) {
+					$id = (int) $dataHandler->substNEWwithIDs[$id];
+				}
 				$pid = (int) $fieldArray['pid'];
 			}