[td-225] fix compiler error.

src/common/src/tglobal.c

@@ -850,7 +850,7 @@ static void doInitGlobalConfig(void) {
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
   cfg.minValue = -1;
-  cfg.maxValue = 10000000000000.0;  //10TB
+  cfg.maxValue = 500000000000.0;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_BYTE;
   taosInitConfigOption(cfg);