Use default Unicode encoding in source code on Windows.

This change drops MBCS encoding (which was the default for premake4)
except in the Collada project which is entirely written assuming MBCS.

Tested By: wraitii
Differential Revision: https://code.wildfiregames.com/D1069
This was SVN commit r20561.

build/premake/premake5.lua

@@ -390,7 +390,6 @@ function project_create(project_name, target_type)
 	kind(target_type)
 
 	filter "action:vs2013"
-		characterset "MBCS"
 		toolset "v120_xp"
 	filter {}
 
@@ -1054,7 +1053,6 @@ function setup_atlas_project(project_name, target_type, rel_source_dirs, rel_inc
 
 	-- Platform Specifics
 	if os.istarget("windows") then
-		defines { "_UNICODE" }
 		-- Link to required libraries
 		links { "winmm", "comctl32", "rpcrt4", "delayimp", "ws2_32" }
 
@@ -1187,8 +1185,6 @@ function setup_atlas_frontend_project (project_name)
 
 	-- Platform Specifics
 	if os.istarget("windows") then
-		defines { "_UNICODE" }
-
 		-- see manifest.cpp
 		project_add_manifest()
 
@@ -1219,7 +1215,9 @@ function setup_collada_project(project_name, target_type, rel_source_dirs, rel_i
 	project_add_x11_dirs()
 
 	-- Platform Specifics
-	if os.istarget("linux") then
+	if os.istarget("windows") then
+		characterset "MBCS"
+	elseif os.istarget("linux") then
 		defines { "LINUX" }
 
 		links {

source/network/StunClient.cpp

@@ -147,7 +147,11 @@ bool CreateStunRequest(ENetHost* transactionHost)
 	int status = getaddrinfo(server_name.c_str(), nullptr, &hints, &res);
 	if (status != 0)
 	{
+#ifdef UNICODE
+		LOGERROR("GetPublicAddress: Error in getaddrinfo: %s", utf8_from_wstring(gai_strerror(status)));
+#else
 		LOGERROR("GetPublicAddress: Error in getaddrinfo: %s", gai_strerror(status));
+#endif
 		return false;
 	}
 

source/ps/UniDoubler.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2009 Wildfire Games.
+/* Copyright (C) 2017 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -27,7 +27,9 @@
 #undef CStr
 
 // First, set up the environment for the Unicode version
+#ifndef _UNICODE
 #define _UNICODE
+#endif
 #define CStr CStrW
 #define tstring wstring
 #define tchar wchar_t