[gnome-panel] xstuff: fix build warnings

[Alberts Muktupāvels <muktupavels src gnome org>]

commit f131cb777ee5f978ff0e55afaaceef72708e06cf
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Sep 27 00:33:51 2015 +0300

    xstuff: fix build warnings

 gnome-panel/xstuff.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gnome-panel/xstuff.c b/gnome-panel/xstuff.c
index 101f71e..a10dc35 100644
--- a/gnome-panel/xstuff.c
+++ b/gnome-panel/xstuff.c
@@ -120,6 +120,9 @@ zoom_draw (GtkWidget *widget,
                        x = 0;
                        y = (height - gdk_pixbuf_get_height (scaled)) / 2;
                        break;
+
+               default:
+                       break;
                }
 
 
@@ -192,6 +195,9 @@ draw_zoom_animation_composited (GdkScreen *gscreen,
                wx = x;
                wy = y - h * (ZOOM_FACTOR / 2);
                break;
+
+       default:
+               break;
        }
 
        gtk_window_move (GTK_WINDOW (win), wx, wy);