They're non-functional these days anyway.

rpcrt4: Free server side arguments with MustFree flag first so other arguments may be used to determine its size.

This also fixes a leak when both MustFree and ServerAllocSize flags are
specified.

LISTVIEW_ScrollColumns() increments the item width by the scroll
delta, so we need the original width to still be present.

The Windows version stops processing the current file and moves to the
next file on the first error.

propsys: Cast to ULONGLONG instead of LONGLONG in test_intconversions test_intconversions to avoid shift overflow.