32/64 bit type mismatch

Change-Id: I4ca19e6efed8ba1ef724136c577a3dcac80f7d62
Reviewed-on: https://gerrit.libreoffice.org/13365
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>