avcodec/h264dec: use picture parameters in ff_print_debug_info2()

Fixes: out of array read
Fixes: 36341/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-6737583085322240

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/h264dec.c

@@ -914,7 +914,7 @@ static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *g
                                  out->qscale_table,
                                  out->motion_val,
                                  NULL,
-                                 h->mb_width, h->mb_height, h->mb_stride, 1);
+                                 out->mb_width, out->mb_height, out->mb_stride, 1);
         }
     }