dont favor the zero MV if mv0 is used (psnr per bitrate gains ranging from 0...

dont favor the zero MV if mv0 is used (psnr per bitrate gains ranging from 0 to 0.14, most are <=0.04 though)

Originally committed as revision 7333 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/motion_est_template.c

@@ -1023,6 +1023,8 @@ static av_always_inline int epzs_motion_search_internal(MpegEncContext * s, int
     dmin= cmp(s, 0, 0, 0, 0, size, h, ref_index, src_index, cmpf, chroma_cmpf, flags);
     map[0]= map_generation;
     score_map[0]= dmin;
+    if(s->flags&CODEC_FLAG_MV0)
+        dmin += (mv_penalty[pred_x] + mv_penalty[pred_y])*penalty_factor;
 
     /* first line */
     if (s->first_slice_line) {