feat(mnode): cluster status fixed some bugs

src/mnode/src/mnodeVgroup.c

@@ -844,6 +844,9 @@ static int32_t mnodeRetrieveStatus(SShowObj *pShow, char *data, int32_t rows, vo
       nAvailble++;
     else
       nUnAvailble++;
+    
+    // releae pVgroup ref
+    mnodeDecVgroupRef(pVgroup);  
   }
 
   // set col data

src/query/src/qTableMeta.c

@@ -72,7 +72,7 @@ SSchema* tscGetColumnSchemaById(STableMeta* pTableMeta, int16_t colId) {
 }
 
 STableMeta* tscCreateTableMetaFromMsg(STableMetaMsg* pTableMetaMsg) {
-  //assert(pTableMetaMsg != NULL && pTableMetaMsg->numOfColumns >= 2);
+  assert(pTableMetaMsg != NULL && pTableMetaMsg->numOfColumns >= 1);
 
   int32_t schemaSize = (pTableMetaMsg->numOfColumns + pTableMetaMsg->numOfTags) * sizeof(SSchema);
   STableMeta* pTableMeta = calloc(1, sizeof(STableMeta) + schemaSize);