[eog] EogPrintPreview: Silence -Wswitch-default

[Felix Riemann <friemann src gnome org>]

commit 4e74b7661893e64547858db6e4775e012bb63e0a
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Mar 11 19:01:22 2016 +0100

    EogPrintPreview: Silence -Wswitch-default
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763505

 src/eog-print-preview.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/eog-print-preview.c b/src/eog-print-preview.c
index 2182b2d..3dfbdfe 100644
--- a/src/eog-print-preview.c
+++ b/src/eog-print-preview.c
@@ -746,6 +746,8 @@ button_press_event_cb (GtkWidget *widget,
        case 1:
                preview->priv->grabbed = press_inside_image_area (preview, event->x, event->y);
                break;
+       default:
+               break;
        }
 
        if (preview->priv->grabbed) {
@@ -770,7 +772,9 @@ button_release_event_cb (GtkWidget *widget,
                preview->priv->r_dx = 0;
                preview->priv->r_dy = 0;
                gtk_widget_queue_draw (GTK_WIDGET (preview));
-
+               break;
+       default:
+               break;
        }
        return FALSE;
 }
@@ -803,6 +807,8 @@ key_press_event_cb (GtkWidget   *widget,
                property = "image-y-align";
                delta = 0.01;
                break;
+       default:
+               break;
        }
 
        if (delta != 0) {