Fixes: null pointer dereference
Fixes: 
67737/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-4858162608930816

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavcodec/hevc_ps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index 38b3721a6d5..25f087ed754 100644
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -460,7 +460,7 @@ int ff_hevc_decode_nal_vps(GetBitContext *gb, 
AVCodecContext *avctx,
     int ret = AVERROR_INVALIDDATA;
     HEVCVPS *vps;
 
-    if (ps->pps_list[vps_id]) {
+    if (ps->vps_list[vps_id]) {
         const HEVCVPS *vps1 = ps->vps_list[vps_id];
         if (vps1->data_size == nal_size &&
             !memcmp(vps1->data, gb->buffer, vps1->data_size))
-- 
2.17.1

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