xcb: fix (negative) coordinate handling

For some reason, XCB accepts positions as unsigned
integers, even though the X protocol explicitly
allows negative values (windows overlapping the
left/top screen border).

After discussion with Samuel and Laszlo, use a
reinterpret_cast to convert from the signed
representation to the unsigned one.

I also extended the clipping of the extents to
the position. I guess if X can't handle widths
beyond XCOORD_MAX, it won't be happy with
x-coordinates exceeding that limit, either.

Change-Id: I2fa0e61f823b6cd45dad6471eaa55f38bb3c3e52
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Reviewed-by: Laszlo Agocs <laszlo.p.agocs@nokia.com>

0 files changed, 0 insertions, 0 deletions