[BUGFIX] FOLLOWUP Queries with NULL don't work

In https://review.typo3.org/28592 we apparently did not 
fix the whole problem. This followup will deal with
the edge-case of using a similar built statement, which
results in the same hash being generated from the
QueryParser.

Resolves: #57130
Related: #55167
Releases: 6.2
Change-Id: I02a478fcabb89d11054f8f0a3c800965edfd7844
Reviewed-on: https://review.typo3.org/28715
Reviewed-by: Marc Bastian Heinrichs
Tested-by: Marc Bastian Heinrichs
Reviewed-by: Markus Klein
Tested-by: Markus Klein