[PATCH weston] window: check the initial wl_display_dispatch()

[Pekka Paalanen]

Check for errors in the first wl_display_dispatch() call. Otherwise
doing something silly like
  $ WAYLAND_SOCKET=999 ./clickdot
will segfault.

Signed-off-by: Pekka Paalanen <ppaalanen at gmail.com>
---
 clients/window.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/clients/window.c b/clients/window.c
index f06f1d6..9752e7e 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -4362,7 +4362,12 @@ display_create(int argc, char *argv[])
 
 	d->registry = wl_display_get_registry(d->display);
 	wl_registry_add_listener(d->registry, &registry_listener, d);
-	wl_display_dispatch(d->display);
+
+	if (wl_display_dispatch(d->display) < 0) {
+		fprintf(stderr, "Failed to process Wayland connection: %m\n");
+		return NULL;
+	}
+
 #ifdef HAVE_CAIRO_EGL
 	if (init_egl(d) < 0)
 		fprintf(stderr, "EGL does not seem to work, "
-- 
1.7.12.4