Unicode port: Unicode version of NSIS can now generate both ANSI & Unicode installers (using new instruction UnicodeInstaller on/off).

Stubs & Plugins differentiation is done automatically using a 'W' suffix.
SConscripts need to be reviewed to generate both variants of Plugins & pluginapi.lib under Unicode compilation.

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6100 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/Makensisw/makensisw.cpp

@@ -706,7 +706,9 @@ BOOL CALLBACK DialogProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam) {
 }
 
 DWORD WINAPI MakeNSISProc(LPVOID p) {
+#ifdef _UNICODE
   TCHAR buf[1024];
+#endif
   char iobuf[1024];           //i/o buffer
   STARTUPINFO si={sizeof(si),};
   SECURITY_ATTRIBUTES sa={sizeof(sa),};