TYPO3 Core

Due to a codechange in 4.1.x it's no longer possible to use non-integer uid values for the tree-data. When a non-integer value is used, a TYPO3 error is shown and the script is exiting/crashing. In my case I'm using a mixture of strings and integers as keys (alphabetic grouped usernames) and since I updated to TYPO3 4.1.x this is no longer possible (worked with 4.0.2 f.e.).

The line causing this is line 773 of class.t3lib_treeview.php (current SVN, TYPO3 4.2 trunk):
if ($newID==0) {

This line has to be changed in one of the two ways in order to get this back working:
a) if ($newID=='0') {
b) if(empty($newID) {

Would be nice if this could be changed to get it working again.

(issue imported from #M8006)