[BUGFIX] Cannot upload from CE in TYPO3 7

Change-Id: Ica4a689fec63cab6b26552cfc610b71ad9899cc1
Fixes: #63356
Reviewed-on: http://review.typo3.org/34765
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>