Re: master 094eb04: Fix MS-Windows build with mingw.org's MinGW

[Eli Zaretskii <eliz@gnu.org>]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>
> Date: Tue, 26 Nov 2019 19:25:54 +0100
> 
> Thanks for that Eli. Since this is expected to work on pre-Vista
> versions of Windows, is the equivalent to the following hack needed in
> the new network-interface-list:
> 
> 	    case MIB_IF_TYPE_ETHERNET:
> 	      /* Windows before Vista reports wireless adapters as
> 		 Ethernet.  Work around by looking at the Description
> 		 string.  */
> 	      if (strstr (adapter->Description, "Wireless "))
> 		{
> 		  ifmt_idx = WLAN;
> 		  if_num = wlan_count++;
> 		}
> 	      else
> 		{
> 		  ifmt_idx = ETHERNET;
> 		  if_num = eth_count++;
> 		}

I guess so.

> GetAdaptersAddresses returns wchar_t* for the description field, which
> means (I hope), that thereʼs some api for converting it appropriately.

We can use wcsstr instead.