avcodec/eacmv: Cleanup generically after init failure

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

libavcodec/eacmv.c

@@ -50,11 +50,8 @@ static av_cold int cmv_decode_init(AVCodecContext *avctx){
 
     s->last_frame  = av_frame_alloc();
     s->last2_frame = av_frame_alloc();
-    if (!s->last_frame || !s->last2_frame) {
-        av_frame_free(&s->last_frame);
-        av_frame_free(&s->last2_frame);
+    if (!s->last_frame || !s->last2_frame)
         return AVERROR(ENOMEM);
-    }
 
     return 0;
 }
@@ -243,4 +240,5 @@ AVCodec ff_eacmv_decoder = {
     .close          = cmv_decode_end,
     .decode         = cmv_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };