avcodec/hcom: Cleanup generically upon init failure

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavcodec/hcom.c

@@ -67,15 +67,11 @@ static av_cold int hcom_init(AVCodecContext *avctx)
         if (s->dict[i].l >= 0 &&
             (s->dict[i].l >= s->dict_entries ||
              s->dict[i].r >= s->dict_entries ||
-             s->dict[i].r < 0 )) {
-            av_freep(&s->dict);
+             s->dict[i].r < 0 ))
             return AVERROR_INVALIDDATA;
-        }
     }
-    if (s->dict[0].l < 0) {
-        av_freep(&s->dict);
+    if (s->dict[0].l < 0)
         return AVERROR_INVALIDDATA;
-    }
 
     avctx->sample_fmt = AV_SAMPLE_FMT_U8;
     s->dict_entry = 0;
@@ -148,4 +144,5 @@ AVCodec ff_hcom_decoder = {
     .close          = hcom_close,
     .decode         = hcom_decode,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };