[BUGFIX] Invalid column blocks synchronization notifications

Fixes: #61333
Change-Id: I7c5b1d94530a0255e2176f43c948df10f914e785
Reviewed-on: http://review.typo3.org/32566
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>