[gimp] app: don't show "Check for updates" button in Preferences when option...

[Jehan <jehanp src gnome org>]

commit f9f45383585c4d9d09ce2359b9e5b0c7f97e058c
Author: Jehan <jehan girinstud io>
Date:   Thu Feb 6 22:20:28 2020 +0100

    app: don't show "Check for updates" button in Preferences when option...
    
    ... deactivated at build anyway.

 app/dialogs/preferences-dialog.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/app/dialogs/preferences-dialog.c b/app/dialogs/preferences-dialog.c
index c22dad364e..dedfe2a3ab 100644
--- a/app/dialogs/preferences-dialog.c
+++ b/app/dialogs/preferences-dialog.c
@@ -1211,12 +1211,14 @@ prefs_dialog_new (Gimp       *gimp,
   gtk_box_pack_start (GTK_BOX (vbox2), hbox, FALSE, FALSE, 0);
 
   /*  Internet access  */
+#ifdef CHECK_UPDATE
   vbox2 = prefs_frame_new (_("Network access"), GTK_CONTAINER (vbox),
                            FALSE);
 
   prefs_check_button_add (object, "check-updates",
                           _("Check for updates (requires internet)"),
                           GTK_BOX (vbox2));
+#endif
 
   /*  Image Thumbnails  */
   vbox2 = prefs_frame_new (_("Image Thumbnails"), GTK_CONTAINER (vbox), FALSE);