Excell export hangs on message

Hello

During export to excell from grid the export hangs.
I made a patch which other users may find helpfull.

Found this bug in version 9.9.007 working with php 8.1.6 during export to excell created this error:
"PHP message: PHP Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /app/_lib/prod/third/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/DateTime.php:503

As this phpoffice in scriptcase is a version from 2019 I had to fix it in a simple way.

/prod/third/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/DateTime.php
line 503:
// if ($t1[1] > 29) {
// $t1[1] += 1900;
// array_unshift($t1, 1);
// } else {
// $t1[] = date(‘Y’);
// }
if ((int) $t1[1] > 29) {
$t1[1] = ((int) $t1[1]) + 1900;
array_unshift($t1, 1);
} else {
$t1[] = date(‘Y’);
}
regards