[lwip] Fix compilation warning

components/net/lwip/lwip-2.0.3/src/apps/ping/ping.c

@@ -157,15 +157,15 @@ rt_err_t ping(char* target_name, rt_uint32_t times, rt_size_t size)
         size = PING_DATA_SIZE;
     }
 
-    memset(&hint, 0, sizeof(hint));
+    rt_memset(&hint, 0, sizeof(hint));
     /* convert URL to IP */
     if (lwip_getaddrinfo(target_name, NULL, &hint, &res) != 0)
     {
         rt_kprintf("ping: unknown host %s\n", target_name);
         return -RT_ERROR;
     }
-    memcpy(&h, &res->ai_addr, sizeof(struct sockaddr_in *));
-    memcpy(&ina, &h->sin_addr, sizeof(ina));
+    rt_memcpy(&h, &res->ai_addr, sizeof(struct sockaddr_in *));
+    rt_memcpy(&ina, &h->sin_addr, sizeof(ina));
     lwip_freeaddrinfo(res);
     if (inet_aton(inet_ntoa(ina), &target_addr) == 0)
     {