fix coverity scan bugs

src/rpc/src/rpcTcp.c

@@ -296,7 +296,7 @@ void *taosOpenTcpClientConnection(void *shandle, void *thandle, uint32_t ip, uin
   SThreadObj *    pThreadObj = shandle;
 
   int fd = taosOpenTcpClientSocket(ip, port, pThreadObj->ip);
-  if (fd <= 0) return NULL;
+  if (fd < 0) return NULL;
 
   SFdObj *pFdObj = taosMallocFdObj(pThreadObj, fd);
   

src/rpc/src/rpcUdp.c

@@ -192,7 +192,7 @@ static void *taosRecvUdpData(void *param) {
 
     char *tmsg = malloc(dataLen + tsRpcOverhead);
     if (NULL == tmsg) {
-      tError("%s failed to allocate memory, size:%d", pConn->label, dataLen);
+      tError("%s failed to allocate memory, size:%ld", pConn->label, dataLen);
       continue;
     }
 

src/util/src/tqueue.c

@@ -145,7 +145,7 @@ int taosReadQitem(taos_queue param, int *type, void **pitem) {
       queue->numOfItems--;
       if (queue->qset) atomic_sub_fetch_32(&queue->qset->numOfItems, 1);
       code = 1;
-      uTrace("item:%p is read out from queue:%p, type:%d items:%d", *pitem, *type, queue->numOfItems);
+      uTrace("item:%p is read out from queue:%p, type:%d items:%d", *pitem, queue, *type, queue->numOfItems);
   } 
 
   pthread_mutex_unlock(&queue->mutex);