--disable-risky fix by (Luca Abeni <lucabe72 at email dot it>)

Originally committed as revision 2243 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpegvideo.c

@@ -3327,7 +3327,6 @@ static void encode_picture(MpegEncContext *s, int picture_number)
 #ifdef CONFIG_RISKY
     /* we need to initialize some time vars before we can encode b-frames */
     // RAL: Condition added for MPEG1VIDEO
-    //FIXME figure out why mpeg1/2 need this !!!
     if (s->codec_id == CODEC_ID_MPEG1VIDEO || s->codec_id == CODEC_ID_MPEG2VIDEO || (s->h263_pred && !s->h263_msmpeg4))
         ff_set_mpeg4_time(s, s->picture_number); 
 #endif
@@ -3746,9 +3745,11 @@ static void encode_picture(MpegEncContext *s, int picture_number)
                     s->tex_pb= backup_s.tex_pb;
                 }
                 s->last_bits= get_bit_count(&s->pb);
-                
+               
+#ifdef CONFIG_RISKY
                 if (s->out_format == FMT_H263 && s->pict_type!=B_TYPE)
                     ff_h263_update_motion_val(s);
+#endif
         
                 if(next_block==0){
                     s->dsp.put_pixels_tab[0][0](s->dest[0], s->me.scratchpad     , s->linesize  ,16);
@@ -3912,9 +3913,11 @@ static void encode_picture(MpegEncContext *s, int picture_number)
                 // RAL: Update last macrobloc type
                 s->last_mv_dir = s->mv_dir;
             
+#ifdef CONFIG_RISKY
                 if (s->out_format == FMT_H263 && s->pict_type!=B_TYPE)
                     ff_h263_update_motion_val(s);
-
+#endif
+		
                 MPV_decode_mb(s, s->block);
             }