[BUGFIX] ID is not converted to an integer to enable string IDs again

Change-Id: I0b69a954a83b4011756f1402b6a7650cab5636d9
Resolves: #60709
Reviewed-on: http://review.typo3.org/31928
Reviewed-by: Jo Hasenau <info@cybercraft.de>
Tested-by: Jo Hasenau <info@cybercraft.de>