fixed broken test in configure: no, DJGPP really is not UNIX...

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16449 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -1125,19 +1125,25 @@ dnl When we are using Cygwin with Motif/GTK+, we want it to appear like
 dnl 'just' a POSIX platform, so the Win32 API must not be available
 dnl ---------------------------------------------------------------------------
 
-define_win32=0
+dnl (Windows-only piece)
+wants_win32=0
+doesnt_want_win32=0
 case "${host}" in
   *-*-cygwin*)
       if test "$wxUSE_MSW" = 1 ; then
-        define_win32=1
+        wants_win32=1
+      else
+        doesnt_want_win32=1
       fi
   ;;
   *-*-mingw*)
-      define_win32=1
+      wants_win32=1
   ;;
 esac
 
-if test "$define_win32" = 1 ; then
+dnl NB: The two tests bellow are *NOT* mutually exclusive! They should only
+dnl     take effect on Cygwin/Mingw and not other platforms.
+if test "$wants_win32" = 1 ; then
     USE_UNIX=0
     USE_WIN32=1
     AC_DEFINE(__WIN32__)
@@ -1146,10 +1152,12 @@ if test "$define_win32" = 1 ; then
     AC_DEFINE(__GNUWIN32__)
     AC_DEFINE(STRICT)
     AC_DEFINE(WINVER, 0x0400)
-else
+fi
+if test "$doesnt_want_win32" = 1 ; then
     USE_UNIX=1
     USE_WIN32=0
 fi
+dnl (end of Windows-only piece)
 
 if test "$USE_UNIX" = 1 ; then
     wxUSE_UNIX=yes