nCount apparently must fit into sal_uInt16 for the cast further down when
passing it into ScAppOptions::SetLRUFuncList sal_uInt16 nCount parameter.  (But
why the odd "nCount < SAL_MAX_UINT16" vs. "nCount <= SAL_MAX_UINT16" off-by-one?
Oh, my.)

Change-Id: I231f4af2ce2e6bf44db8db3fd9e965adfa17fecb
Reviewed-on: https://gerrit.libreoffice.org/48838Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>