[gtk/async-highlight] gtk-demo: Fix the Windows build

[Matthias Clasen <matthiasc src gnome org>]

commit 008c1e7c6c06957621e61e993c69f39bd58840ca
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Aug 13 15:49:45 2020 -0400

    gtk-demo: Fix the Windows build

 demos/gtk-demo/fontify.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/demos/gtk-demo/fontify.c b/demos/gtk-demo/fontify.c
index 8f8231442b..f4115352d5 100644
--- a/demos/gtk-demo/fontify.c
+++ b/demos/gtk-demo/fontify.c
@@ -8,8 +8,10 @@
 #include <gtk/gtk.h>
 #include <glib/gstdio.h>
 
+#ifdef HAVE_GIO_UNIX
 #include <gio/gunixoutputstream.h>
 #include <fcntl.h>
+#endif
 
 
 /* This is the guts of gtk_text_buffer_insert_markup,
@@ -438,6 +440,7 @@ fontify (const char    *format,
   text = gtk_text_buffer_get_text (source_buffer, &start, &end, TRUE);
   bytes = g_bytes_new_static (text, strlen (text));
 
+#ifdef HAVE_GIO_UNIX
   /* Work around https://gitlab.gnome.org/GNOME/glib/-/issues/2182 */
   if (G_IS_UNIX_OUTPUT_STREAM (g_subprocess_get_stdin_pipe (subprocess)))
     {
@@ -445,6 +448,7 @@ fontify (const char    *format,
       int fd = g_unix_output_stream_get_fd (G_UNIX_OUTPUT_STREAM (stdin_pipe));
       fcntl (fd, F_SETFL, O_NONBLOCK);
     }
+#endif
 
   g_subprocess_communicate_async (subprocess,
                                   bytes,