avcodec/hevc: clear tab_slice_address of ctb on error.

This allows us to detect which areas have failed to decode
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/hevc.c

@@ -1932,8 +1932,11 @@ static int hls_decode_entry(AVCodecContext *avctxt, void *isFilterThread)
         s->filter_slice_edges[ctb_addr_rs]  = s->sh.slice_loop_filter_across_slices_enabled_flag;
 
         more_data = hls_coding_quadtree(s, x_ctb, y_ctb, s->sps->log2_ctb_size, 0);
-        if (more_data < 0)
+        if (more_data < 0) {
+            s->tab_slice_address[ctb_addr_rs] = -1;
             return more_data;
+        }
+
 
         ctb_addr_ts++;
         ff_hevc_save_states(s, ctb_addr_ts);
@@ -1999,8 +2002,10 @@ static int hls_decode_entry_wpp(AVCodecContext *avctxt, void *input_ctb_row, int
         hls_sao_param(s, x_ctb >> s->sps->log2_ctb_size, y_ctb >> s->sps->log2_ctb_size);
         more_data = hls_coding_quadtree(s, x_ctb, y_ctb, s->sps->log2_ctb_size, 0);
 
-        if (more_data < 0)
+        if (more_data < 0) {
+            s->tab_slice_address[ctb_addr_rs] = -1;
             return more_data;
+        }
 
         ctb_addr_ts++;