[BUGFIX] Prevent undefined array key in DataHandler

Resolves: #96069
Releases: master, 11.5
Change-Id: I2d883ebb7682ac7f402cdcb91b015ca74bdb72b4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72294

Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>

typo3/sysext/core/Classes/DataHandling/DataHandler.php

@@ -1732,7 +1732,7 @@ class DataHandler implements LoggerAwareInterface
         // Skip range validation, if the default value equals 0 and the input value is 0, "0" or an empty string.
         // This is needed for timestamp date fields with ['range']['lower'] set.
         $skipRangeValidation =
-            isset($tcaFieldConf['default'])
+            isset($tcaFieldConf['default'], $res['value'])
             && (int)$tcaFieldConf['default'] === 0
             && ($res['value'] === '' || $res['value'] === '0' || $res['value'] === 0);