qsvenc_hevc: Fix usage of ff_hevc_extract_rbsp

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

libavcodec/qsvenc_hevc.c

@@ -68,7 +68,7 @@ static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
     }
 
     /* parse the SPS */
-    ret = ff_hevc_extract_rbsp(NULL, avctx->extradata + 4, avctx->extradata_size - 4, &sps_nal);
+    ret = ff_hevc_extract_rbsp(avctx->extradata + 4, avctx->extradata_size - 4, &sps_nal);
     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR, "Error unescaping the SPS buffer\n");
         return ret;