[BUGFIX] Make recycler PHP 7.2 compatible

Change-Id: I36167b0a8b61532adbafea93c88c93097ea52d73
Resolves: #83297
Releases: master, 8.7, 7.6
Reviewed-on: https://review.typo3.org/55042
Reviewed-on: https://review.typo3.org/55047


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/recycler/Classes/Domain/Model/DeletedRecords.php

@@ -121,7 +121,7 @@ class DeletedRecords
         $deletedRecords = $this->loadData($id, $table, $depth, '', $filter)->getDeletedRows();
         $countTotal = 0;
         foreach ($this->table as $tableName) {
-            $countTotal += count($deletedRecords[$tableName]);
+            $countTotal += isset($deletedRecords[$tableName]) ? count($deletedRecords[$tableName]) : 0;
         }
         return $countTotal;
     }