[mutter/wayland] Fix distcheck

[Giovanni Campagna <gcampagna src gnome org>]

commit 2734c8547f56568ceddd7eb0a15eb2cac7082029
Author: Giovanni Campagna <gcampagn redhat com>
Date:   Tue Sep 17 09:49:17 2013 +0200

    Fix distcheck
    
    Remove a warning that makes us fail with -Werror

 src/wayland/weston-launch.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/wayland/weston-launch.c b/src/wayland/weston-launch.c
index 3cb4226..d811648 100644
--- a/src/wayland/weston-launch.c
+++ b/src/wayland/weston-launch.c
@@ -449,8 +449,6 @@ tty_reset(struct weston_launch *wl)
 static void
 quit(struct weston_launch *wl, int status)
 {
-       int err;
-
        if (wl->child > 0)
                kill(wl->child, SIGKILL);