avcodec/proresenc_aw : fix interlace encoding for unsafe height

fix the call of the unsafe version of slice encoding in interlace mode
fix padding line count in sub image with fill in interlace mode

libavcodec/proresenc_anatoliy.c

@@ -485,7 +485,7 @@ static inline void subimage_with_fill_template(uint16_t *src, unsigned x, unsign
     } else {
         src_stride = stride; /* 2 lines stride */
         src += y * src_stride + x;
-        box_height = FFMIN(height - y * 2, dst_height);
+        box_height = FFMIN(height/2 - y, dst_height);
         if (!is_top_field)
             src += stride >> 1;
     }
@@ -671,7 +671,7 @@ static int prores_encode_picture(AVCodecContext *avctx, const AVFrame *pic,
             picture_height = avctx->height / 2;
         }
         mb_height = (picture_height + 15) >> 4;
-        unsafe_mb_height_limit = mb_height * 2;
+        unsafe_mb_height_limit = mb_height;
     }
 
     for (i = av_log2(DEFAULT_SLICE_MB_WIDTH); i >= 0; --i) {

tests/ref/vsynth/vsynth3-prores_444_int

-4928501bad7c46a277eab54440f2a794 *tests/data/fate/vsynth3-prores_444_int.mov
-230539 tests/data/fate/vsynth3-prores_444_int.mov
-7acff20947af998d5a6e6f85ff24a6d2 *tests/data/fate/vsynth3-prores_444_int.out.rawvideo
-stddev:    3.27 PSNR: 37.82 MAXDIFF:   42 bytes:    86700/    86700
+270045a731d4cb6ba253880021c87a63 *tests/data/fate/vsynth3-prores_444_int.mov
+184397 tests/data/fate/vsynth3-prores_444_int.mov
+a8852aa2841c2ce5f2aa86176ceda4ef *tests/data/fate/vsynth3-prores_444_int.out.rawvideo
+stddev:    3.24 PSNR: 37.91 MAXDIFF:   41 bytes:    86700/    86700

tests/ref/vsynth/vsynth3-prores_int

-8bd60c3d149977dd25e21adcf57d76fa *tests/data/fate/vsynth3-prores_int.mov
-148325 tests/data/fate/vsynth3-prores_int.mov
-628a667a0de678239f05a6e5497c4601 *tests/data/fate/vsynth3-prores_int.out.rawvideo
-stddev:    3.06 PSNR: 38.40 MAXDIFF:   29 bytes:    86700/    86700
+ee1f14b23eb9dee4d59b021d4ec041bf *tests/data/fate/vsynth3-prores_int.mov
+120484 tests/data/fate/vsynth3-prores_int.mov
+e5859ba47a99f9e53c1ddcaa68a8f8f8 *tests/data/fate/vsynth3-prores_int.out.rawvideo
+stddev:    2.92 PSNR: 38.81 MAXDIFF:   29 bytes:    86700/    86700