and assigning to a 64 bit integer variable. This would
have caused a big problem here if we increase MAXROWCOUNT
above 2^32.

Also remove un-necessary casts introduced in the commit
b4df9b0b4c7411f257b0a397687587114a53208e

Thanks to @sberg who pointed out the real meaning of the
MSVC compiler warning reported @
https://lists.freedesktop.org/archives/libreoffice/2019-February/082078.html

Change-Id: Ieedad5ba478e5162abbdfdc79820cf001c2a85f2
Reviewed-on: https://gerrit.libreoffice.org/68068Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Jenkins