[evince] Fix compile warning

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 699514995b385e92d5b6818b6d8c0095355407c3
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Sat Dec 29 16:13:31 2012 +0100

    Fix compile warning

 shell/ev-zoom-action-widget.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/shell/ev-zoom-action-widget.c b/shell/ev-zoom-action-widget.c
index feee43f..7e511b3 100644
--- a/shell/ev-zoom-action-widget.c
+++ b/shell/ev-zoom-action-widget.c
@@ -129,6 +129,8 @@ ev_zoom_action_widget_update_sizing_mode (EvZoomActionWidget *control)
                 icon_name = EV_STOCK_ZOOM_WIDTH;
                 tooltip = _("Fit Width");
                 break;
+        case EV_SIZING_AUTOMATIC:
+                /* TODO */
         case EV_SIZING_FREE:
                 break;
         }