fix tests

Gabriele Contini

2020-03-08 8fef57bc398b85b9b6d05b1a3585baa084b31e8b

 src/library/hw_identifier/ethernet.cpp

@@ -32,7 +32,7 @@
   }

   for (auto &it : adapters) {
      unsigned int k, data_len, data_byte;
      unsigned int k, data_len;
      array<uint8_t, HW_IDENTIFIER_PROPRIETARY_DATA> identifier;
      data_len = use_ip ? sizeof(os::OsAdapterInfo::ipv4_address) : sizeof(os::OsAdapterInfo::mac_address);