[gtk+] Fix compiling for win32

[Jan-Joost Spanjers <jspanjers src gnome org>]

commit 99e194e7cc76c420c42562e2c77876d225975430
Author: Hib Eris <hib hiberis nl>
Date:   Sun Oct 28 20:05:23 2012 +0100

    Fix compiling for win32
    
    https://bugzilla.gnome.org/show_bug.cgi?id=687066

 gtk/gtk-launch.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtk-launch.c b/gtk/gtk-launch.c
index 6d5be1c..7a15ffe 100644
--- a/gtk/gtk-launch.c
+++ b/gtk/gtk-launch.c
@@ -28,7 +28,9 @@
 #include <glib.h>
 #include <glib/gi18n.h>
 #include <gio/gio.h>
+#ifdef G_OS_UNIX
 #include <gio/gdesktopappinfo.h>
+#endif
 #include <gtk.h>
 
 static gchar **args = NULL;
@@ -45,8 +47,10 @@ main (int argc, char *argv[])
   GOptionContext *context = NULL;
   gchar *summary;
   gchar *app_name;
+#ifdef G_OS_UNIX
   gchar *desktop_file_name;
-  GDesktopAppInfo *info;
+#endif
+  GAppInfo *info = NULL;
   GAppLaunchContext *launch_context;
   GList *l;
   GFile *f;
@@ -107,12 +111,17 @@ main (int argc, char *argv[])
   gtk_init (&argc, &argv);
 
   app_name = *args;
+#ifdef G_OS_UNIX
   if (g_str_has_suffix (app_name, ".desktop"))
     desktop_file_name = g_strdup (app_name);
   else 
     desktop_file_name = g_strconcat (app_name, ".desktop", NULL);
-  info = g_desktop_app_info_new (desktop_file_name);
+  info = G_APP_INFO (g_desktop_app_info_new (desktop_file_name));
   g_free (desktop_file_name);
+#else
+#warning Please add support for creating AppInfo from id for your OS
+  g_printerr (_("Creating AppInfo from id not supported on non unix operating systems"));
+#endif
   args++;
 
   if (!info)
@@ -133,7 +142,7 @@ main (int argc, char *argv[])
     }
 
   launch_context = (GAppLaunchContext*) gdk_display_get_app_launch_context (gdk_display_get_default ());
-  if (!g_app_info_launch (G_APP_INFO (info), l, launch_context, &error))
+  if (!g_app_info_launch (info, l, launch_context, &error))
     {
        /* Translators: the first %s is the program name, the second one  */
        /* is the error message.                                          */