... if more than one argument is passed to PRODUCT() or SUMSQ() and
matrix/array arguments are involved the functions returned wrong
results.

For example, wrong behavior
=PRODUCT({2,3},{4,5})   gave 6
=SUMSQ({2,3},{4,5})     gave 34

Correct is
=PRODUCT({2,3},{4,5})   result 120
=SUMSQ({2,3},{4,5})     result 54

Change-Id: Iec7b136a5cc678416f28b1abfe19cd0901ef22b6
(cherry picked from commit c1780ad2)
Reviewed-on: https://gerrit.libreoffice.org/18864Reviewed-by: Łukasz Hryniuk <lukasz.hryniuk@wp.pl>
Tested-by: Łukasz Hryniuk <lukasz.hryniuk@wp.pl>