[BUGFIX] Invalid reference count on storing new child records in FlexForm

If creating a new parent record that contains inline child
records as part of a FlexForm configuration, the resulting
reference count is the temporary "NEW..." identifier. The
expected result is to have the number of child references
in that case as well.

Resolves: #58307
Releases: master, 6.2
Change-Id: I36a4dd06a38ad5d9f197190658b97f8a3b5fa234
Reviewed-on: http://review.typo3.org/37345


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>