If alex is too lazy to apply a patch, then i'll do it :)

This one fixes a sig11 when the -vo can't be initialized and get_buffer fails
for libavcodec


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11373 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpcodecs/vd_ffmpeg.c

@@ -728,6 +728,9 @@ static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
         mpi->stride[2]=pic->linesize[2];
     }
     
+    if (!mpi->planes[0])
+	return NULL;
+
     if(avctx->pix_fmt==PIX_FMT_YUV422P && mpi->chroma_y_shift==1){
 	// we have 422p but user wants 420p
 	mpi->stride[1]*=2;