lavc/hevcdec: Treat clean random access nals as keyframes for -skip_frame.

Fixes ticket #7227.

Reviewed-by: Mark Thompson

libavcodec/hevcdec.c

@@ -2919,7 +2919,7 @@ static int decode_nal_unit(HEVCContext *s, const H2645NAL *nal)
         if (
             (s->avctx->skip_frame >= AVDISCARD_BIDIR && s->sh.slice_type == HEVC_SLICE_B) ||
             (s->avctx->skip_frame >= AVDISCARD_NONINTRA && s->sh.slice_type != HEVC_SLICE_I) ||
-            (s->avctx->skip_frame >= AVDISCARD_NONKEY && !IS_IDR(s))) {
+            (s->avctx->skip_frame >= AVDISCARD_NONKEY && !IS_IRAP(s))) {
             break;
         }