[cheese] libcheese: Fix warning on exit

[Bastien Nocera <hadess src gnome org>]

commit 12bce8bfda1226f3a813cdfe4317067fa4a1ead0
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Sep 4 10:35:39 2015 +0200

    libcheese: Fix warning on exit
    
     #0  0x00007ffff0ea4623 in _g_log_abort (breakpoint=1) at gmessages.c:324
     #1  g_logv (log_domain=0x7ffff11c9224 "GLib-GObject", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized 
out>, args=args entry=0x7fffffffd448) at gmessages.c:1081
     #2  0x00007ffff0ea4782 in g_log (log_domain=<optimized out>, log_level=<optimized out>, 
format=<optimized out>) at gmessages.c:1119
     #3  0x00007ffff7bd2380 in cheese_camera_finalize (object=0x14022d0) at libcheese/cheese-camera.c:1274
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754556

 libcheese/cheese-camera.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libcheese/cheese-camera.c b/libcheese/cheese-camera.c
index 135844b..95edc90 100644
--- a/libcheese/cheese-camera.c
+++ b/libcheese/cheese-camera.c
@@ -1271,7 +1271,7 @@ cheese_camera_finalize (GObject *object)
   if (priv->photo_filename)
     g_free (priv->photo_filename);
   g_free (priv->current_effect_desc);
-  g_object_unref (priv->device);
+  g_clear_object (&priv->device);
   g_boxed_free (CHEESE_TYPE_VIDEO_FORMAT, priv->current_format);
 
   /* Free CheeseCameraDevice array */