[gnome-applets] battstat: fix -Wswitch-enum warning

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 7506c2f959fc41ab11b1f36e64b4e72169b2a7f9
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Apr 3 21:09:10 2020 +0300

    battstat: fix -Wswitch-enum warning

 gnome-applets/battstat/battstat-applet.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gnome-applets/battstat/battstat-applet.c b/gnome-applets/battstat/battstat-applet.c
index 6ca8db5b9..aa1d39480 100644
--- a/gnome-applets/battstat/battstat-applet.c
+++ b/gnome-applets/battstat/battstat-applet.c
@@ -1205,6 +1205,7 @@ grid_layout_attach (GtkGrid        *grid,
       gtk_grid_attach (grid, child, 1, 2, 1, 1);
       break;
 
+    case LAYOUT_NONE:
     default:
       break;
   }