Endianness fix for xvideo vout on big endian processors (I still have problems...

Endianness fix for xvideo vout on big endian processors (I still have problems when shm is disabled, but that might be related to my drivers, if anybody could test that).

modules/video_output/x11/xcommon.c

@@ -1173,7 +1173,8 @@ static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
         p_pic->p_sys->p_image =
             CreateShmImage( p_vout, p_vout->p_sys->p_display,
 #   ifdef MODULE_NAME_IS_xvideo
-                            p_vout->p_sys->i_xvport, p_vout->output.i_chroma,
+                            p_vout->p_sys->i_xvport, 
+                            VLC2X11_FOURCC(p_vout->output.i_chroma),
 #   else
                             p_vout->p_sys->p_visual,
                             p_vout->p_sys->i_screen_depth,
@@ -1188,7 +1189,8 @@ static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
         p_pic->p_sys->p_image =
             CreateImage( p_vout, p_vout->p_sys->p_display,
 #ifdef MODULE_NAME_IS_xvideo
-                         p_vout->p_sys->i_xvport, p_vout->output.i_chroma,
+                         p_vout->p_sys->i_xvport, 
+                         VLC2X11_FOURCC(p_vout->output.i_chroma),
                          p_pic->format.i_bits_per_pixel,
 #else
                          p_vout->p_sys->p_visual,