compiz: Changes to 'master'

[Danny Baumann]

 src/screen.c |    6 ++++++
 1 file changed, 6 insertions(+)

New commits:
commit 4193ef536fa28b86df148975f06bda8afd3e36f9
Author: Danny Baumann <dannybaumann at web.de>
Date:   Thu Oct 4 07:12:08 2007 +0200

    glGetString is allowed to return NULL in case an error happened, so avoid crashing in this case and bail out instead.