[td-225]fix error in global variables.

src/client/src/tscServer.c

@@ -198,6 +198,8 @@ int tscSendMsgToServer(SSqlObj *pSql) {
   };
 
   pSql->SRpcReqContext = rpcSendRequest(pObj->pDnodeConn, &pSql->ipList, &rpcMsg);
+  assert(pSql->SRpcReqContext != NULL);
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -412,7 +414,6 @@ void tscKillSTableQuery(SSqlObj *pSql) {
 
   for (int i = 0; i < pSql->numOfSubs; ++i) {
     SSqlObj *pSub = pSql->pSubs[i];
-
     if (pSub == NULL) {
       continue;
     }

src/client/src/tscSql.c

@@ -607,7 +607,9 @@ int* taos_fetch_lengths(TAOS_RES *res) {
 char *taos_get_client_info() { return version; }
 
 void taos_stop_query(TAOS_RES *res) {
-  if (res == NULL) return;
+  if (res == NULL) {
+    return;
+  }
 
   SSqlObj *pSql = (SSqlObj *)res;
   SSqlCmd *pCmd = &pSql->cmd;