FOX GUI Toolkit

I compiled FOX with Mingw and MSys (a Bash environment for MS Windows).
With the command:

$ ./configure --enable-shared --prefix=/mingw
$ make

When running the dirlist.exe the filenames containing non ASCII characters
wheren't correctly displayed. I found out, that in the other Windows
Makefiles, a Compiler Define "UNICODE" is defined, wich is not defined by
the configure script.

The configure script must be changed, to correctly set this define.

if test "x$CYGWIN" = "xyes" -o "x$MINGW32" = "xyes" ; then
# use Win32 Unicode
AC_DEFINE(UNICODE)
fi