[gnome-commander/ConvertWarningsToErrors] viewer-widget.c: fix for switch-default

[Uwe Scholz <uwescholz src gnome org>]

commit 6ce8ef2fa01abbdf4f45732ed26ee82e68ee2b05
Author: Mamoru TASAKA <mtasaka fedoraproject org>
Date:   Wed Apr 19 15:56:19 2017 +0900

    viewer-widget.c: fix for switch-default
    
    src/intviewer/viewer-widget.cc:364:12: error: switch missing default case [-Werror=switch-default]
    likewise

 src/intviewer/viewer-widget.cc |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/intviewer/viewer-widget.cc b/src/intviewer/viewer-widget.cc
index c685d45..f5a783b 100644
--- a/src/intviewer/viewer-widget.cc
+++ b/src/intviewer/viewer-widget.cc
@@ -381,6 +381,9 @@ void gviewer_set_display_mode(GViewer *obj, VIEWERDISPLAYMODE mode)
         case DISP_MODE_IMAGE:
             client = obj->priv->iscrollbox;
             break;
+
+        default:
+            break;
     }
 
     if (client != obj->priv->last_client)
@@ -404,6 +407,9 @@ void gviewer_set_display_mode(GViewer *obj, VIEWERDISPLAYMODE mode)
             case DISP_MODE_IMAGE:
                 image_render_notify_status_changed(obj->priv->imgr);
                 break;
+
+            default:
+                break;
         }
 
         gtk_widget_show (client);