compiz: Changes to 'master'

[Dennis Kasprzyk]

 src/screen.c |    6 ++++++
 src/window.c |    4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

New commits:
commit 96f9b2e17031dcd6fcdc7f0a576a9131f68ef748
Author: Roland Baer <roland at Vista.(none)>
Date:   Thu Jul 19 11:43:07 2007 +0300

    Unsigned less than zero

commit 949515630964d55541a820e2473eed3b52256ba5
Author: Roland Baer <roland at Vista.(none)>
Date:   Thu Jul 19 11:10:03 2007 +0300

    Null checks to prevent crashs