Merge pull request #1453 from sangshuduo/fix-memory-leak-pMeter

fix pMeter memory leak in mgmtMeter.c

src/system/detail/src/mgmtMeter.c

@@ -567,6 +567,7 @@ int mgmtCreateMeter(SDbObj *pDb, SCreateTableMsg *pCreate) {
     pMetric = mgmtGetMeter(pTagData);
     if (pMetric == NULL) {
       mError("table:%s, corresponding super table does not exist", pCreate->meterId);
+      free(pMeter);
       return TSDB_CODE_INVALID_TABLE;
     }