Update metaSnapshot.c

source/dnode/vnode/src/meta/metaSnapshot.c

@@ -109,7 +109,7 @@ int32_t metaSnapRead(SMetaSnapReader* pReader, uint8_t** ppData) {
   }
 
   SSnapDataHdr* pHdr = (SSnapDataHdr*)(*ppData);
-  pHdr->type = 0;  // TODO: use macro
+  pHdr->type = SNAP_DATA_META;
   pHdr->size = nData;
   memcpy(pHdr->data, pData, nData);
 
@@ -147,8 +147,6 @@ int32_t metaSnapWriterOpen(SMeta* pMeta, int64_t sver, int64_t ever, SMetaSnapWr
 
   metaBegin(pMeta);
 
-  metaBegin(pMeta);
-
   *ppWriter = pWriter;
   return code;