[REVIEW-3-6] fix for fdo#54558, crash during cached value import of

[Markus Mohrhard]

Hey,

[1] fixes a crash during the xlsx import of cached value for array
formulas. The solution is to check that the cell exists and move the
array formula import in front of the cached value import.

Regards,
Markus

[1] http://cgit.freedesktop.org/libreoffice/core/commit/?id=6ed264ffca065ed2aa36624ba29d9764ff042a72

P.S. Please also correct the bug nr from 54559 to 54558 when cherry-picking