[gnome-tetravex] Readd clock icon.

[Arnaud B. <arnaudb src gnome org>]

commit 6d4297079eb07d8a87ef85492b17127df78c0521
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Thu Oct 31 02:20:42 2019 +0100

    Readd clock icon.

 src/gnome-tetravex.vala | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index e781907..b80c65b 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -364,6 +364,7 @@ private class Tetravex : Gtk.Application
 
         Box box = new Box (Orientation.HORIZONTAL, /* spacing */ 8);
         Image image = new Image.from_icon_name ("preferences-system-time-symbolic", IconSize.MENU);
+        image.show ();
         box.add (image);
         clock_label = new Label ("");
         clock_label.show ();