avcodec/mpegvideo_enc: Move H.263 specific check to ituh263enc.c

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/ituh263enc.c

@@ -834,6 +834,9 @@ av_cold void ff_h263_encode_init(MpegEncContext *s)
     }
     s->ac_esc_length= 7+1+6+8;
 
+    if (s->modified_quant)
+        s->chroma_qscale_table = ff_h263_chroma_qscale_table;
+
     // use fcodes >1 only for MPEG-4 & H.263 & H.263+ FIXME
     switch(s->codec_id){
     case AV_CODEC_ID_MPEG4:

libavcodec/mpegvideo_enc.c

@@ -994,9 +994,6 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
         s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
     }
 
-    if ((CONFIG_H263P_ENCODER || CONFIG_RV20_ENCODER) && s->modified_quant)
-        s->chroma_qscale_table = ff_h263_chroma_qscale_table;
-
     if (s->slice_context_count > 1) {
         s->rtp_mode = 1;