Fix double free at exit time.

On Ubuntu (system used by the problem reporter) this is a double free,
on OpenBSD with S in malloc.conf it ends in a SIGBUS probably because of
the aggressive junking.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/xinerama.c b/src/xinerama.c
index f037b05..a8bceb2 100644
--- a/src/xinerama.c
+++ b/src/xinerama.c
@@ -66,6 +66,7 @@ init_xinerama(void)
         }
         if (xine_screen_count < 2) {
                XFree (xine_screens);
+               xine_screens = NULL;
                return;
         }