[gnome-panel] wncklet: fix build warnings

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 8d8dae55bddbe39540a842a8e3116121f07e8b02
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Dec 20 00:02:29 2015 +0200

    wncklet: fix build warnings

 applets/wncklet/showdesktop.c |    9 +++++++++
 applets/wncklet/window-list.c |    6 +++---
 2 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/applets/wncklet/showdesktop.c b/applets/wncklet/showdesktop.c
index 6f67318..3efca61 100644
--- a/applets/wncklet/showdesktop.c
+++ b/applets/wncklet/showdesktop.c
@@ -117,6 +117,9 @@ button_size_allocated (GtkWidget       *button,
        case GTK_ORIENTATION_VERTICAL:
                sdd->size = allocation->width;
                break;
+       default:
+               g_assert_not_reached ();
+               break;
        }
 
         update_icon (sdd);
@@ -149,6 +152,9 @@ update_icon (ShowDesktopData *sdd)
        case GTK_ORIENTATION_VERTICAL:
                thickness = padding.left + padding.right;
                break;
+       default:
+               g_assert_not_reached ();
+               break;
        }
 
        icon_size = sdd->size - thickness;
@@ -192,6 +198,9 @@ update_icon (ShowDesktopData *sdd)
                 height = (icon_size * height) / width;
                 width = icon_size;
                 break;
+        default:
+                g_assert_not_reached ();
+                break;
         }
 
         scaled = gdk_pixbuf_scale_simple (icon,
diff --git a/applets/wncklet/window-list.c b/applets/wncklet/window-list.c
index 96d89cc..c4cb990 100644
--- a/applets/wncklet/window-list.c
+++ b/applets/wncklet/window-list.c
@@ -538,11 +538,11 @@ setup_dialog (GtkBuilder   *builder,
        button = get_grouping_button (tasklist, tasklist->grouping);
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
        g_object_set_data (G_OBJECT (tasklist->never_group_radio),
-                          "group_value", "never-group");
+                          "group_value", (gpointer) "never-group");
        g_object_set_data (G_OBJECT (tasklist->auto_group_radio),
-                          "group_value", "auto-group");
+                          "group_value", (gpointer) "auto-group");
        g_object_set_data (G_OBJECT (tasklist->always_group_radio),
-                          "group_value", "always-group");
+                          "group_value", (gpointer) "always-group");
 
        g_signal_connect (G_OBJECT (tasklist->never_group_radio), "toggled",
                          (GCallback) group_windows_toggled, tasklist);