fix: codex

Signed-off-by: Nxionglei6 <xionglei6@huawei.com>

device_info/device_info_kits.cpp

@@ -130,7 +130,7 @@ const char *AclGetSerial(void)
     int ret = instance.GetSerialID(result);
     if (ret == 0) {
         ret = strcpy_s(serialNumber, sizeof(serialNumber), result.c_str());
-        DINFO_CHECK(ret == 0, return -1, "Failed to copy");
+        DINFO_CHECK(ret == 0, return nullptr, "Failed to copy");
     }
     DINFO_LOGI("GetSerial %s", serialNumber);
     return serialNumber;