[gnome-shell] shell/util: Don't compile in unused code when !HAVE_SYSTEMD

[Marge Bot <marge-bot src gnome org>]

commit bbb2f2603adc64a5e8cf2b1f453306d89274c58b
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Mon Jan 25 17:01:29 2021 +0800

    shell/util: Don't compile in unused code when !HAVE_SYSTEMD
    
    Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3620
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1588>

 src/shell-util.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/shell-util.c b/src/shell-util.c
index 37b0cfaf23..ab8046a5a8 100644
--- a/src/shell-util.c
+++ b/src/shell-util.c
@@ -570,6 +570,7 @@ shell_util_get_uid (void)
   return getuid ();
 }
 
+#ifdef HAVE_SYSTEMD
 typedef struct {
   GDBusConnection *connection;
   gchar           *command;
@@ -692,6 +693,7 @@ on_systemd_job_removed_cb (GDBusConnection *connection,
 
   g_object_unref (task);
 }
+#endif /* HAVE_SYSTEMD */
 
 static void
 shell_util_systemd_call (const char           *command,