fraps: Add release_buffer forgotten when reget_buffer was removed.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

libavcodec/fraps.c

@@ -180,6 +180,8 @@ static int decode_frame(AVCodecContext *avctx,
         }
     }
 
+    if (s->frame.data[0])
+        avctx->release_buffer(avctx, &s->frame);
     f->pict_type = AV_PICTURE_TYPE_I;
     f->key_frame = 1;
     f->reference = 0;