[BUGFIX] rdndt getClassSchema() in thawProperties(

getClassSchema() is being called within a foreach loop while the
$className never changes for that call.

Change-Id: I699a1a0ab34d784b7463244f218f4e8a0c0b7a0c
Resolves: #55991
Releases: 6.2
Reviewed-on: https://review.typo3.org/27633
Reviewed-by: Marcin Sągol
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel

typo3/sysext/extbase/Classes/Persistence/Generic/Mapper/DataMapper.php

@@ -181,6 +181,7 @@ class DataMapper implements \TYPO3\CMS\Core\SingletonInterface {
 	 */
 	protected function thawProperties(\TYPO3\CMS\Extbase\DomainObject\DomainObjectInterface $object, array $row) {
 		$className = get_class($object);
+		$classSchema = $this->reflectionService->getClassSchema($className);
 		$dataMap = $this->getDataMap($className);
 		$object->_setProperty('uid', (int)$row['uid']);
 		$object->_setProperty('pid', (int)$row['pid']);
@@ -198,7 +199,7 @@ class DataMapper implements \TYPO3\CMS\Core\SingletonInterface {
 			}
 			$columnMap = $dataMap->getColumnMap($propertyName);
 			$columnName = $columnMap->getColumnName();
-			$propertyData = $this->reflectionService->getClassSchema($className)->getProperty($propertyName);
+			$propertyData = $classSchema->getProperty($propertyName);
 			$propertyValue = NULL;
 			if ($row[$columnName] !== NULL) {
 				switch ($propertyData['type']) {