DirectDraw/Direct3D: make a clean copy of the video-format

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 2f3d2d96b82b4eea9a17861b3da294457d1b4896)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/video_output/msw/direct3d.c

@@ -228,7 +228,8 @@ static int Open(vlc_object_t *object)
     var_AddCallback(vd, "video-wallpaper", DesktopCallback, NULL);
 
     /* Setup vout_display now that everything is fine */
-    vd->fmt  = fmt;
+    video_format_Clean(&vd->fmt);
+    video_format_Copy(&vd->fmt, &fmt);
     vd->info = info;
 
     vd->pool    = Pool;

modules/video_output/msw/directx.c

@@ -210,7 +210,8 @@ static int Open(vlc_object_t *object)
     var_AddCallback(vd, "video-wallpaper", WallpaperCallback, NULL);
 
     /* Setup vout_display now that everything is fine */
-    vd->fmt     = fmt;
+    video_format_Clean(&vd->fmt);
+    video_format_Copy(&vd->fmt, &fmt);
     vd->info    = info;
 
     vd->pool    = Pool;