avcodec/hevc: Fix typo in num_entry_point_offsets check

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 3051e7fa71)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/hevc.c

@@ -676,7 +676,7 @@ static int hls_slice_header(HEVCContext *s)
     if (s->pps->tiles_enabled_flag || s->pps->entropy_coding_sync_enabled_flag) {
         unsigned num_entry_point_offsets = get_ue_golomb_long(gb);
         // It would be possible to bound this tighter but this here is simpler
-        if (sh->num_entry_point_offsets > get_bits_left(gb)) {
+        if (num_entry_point_offsets > get_bits_left(gb)) {
             av_log(s->avctx, AV_LOG_ERROR, "num_entry_point_offsets %d is invalid\n", num_entry_point_offsets);
             return AVERROR_INVALIDDATA;
         }