[shotwell/shotwell-0.26] Prevent crash when removing the event's last photo

[Jens Georg <jensgeorg src gnome org>]

commit d5cffacd4e8377cca9f5d4a4f7b0c5a3e69ff737
Author: Jens Georg <mail jensge org>
Date:   Sat Jan 13 23:05:18 2018 +0100

    Prevent crash when removing the event's last photo
    
    Issue is that this would destroy the event and destroy the media page,
    afterwards trying to update the undo list on the now destroyed view
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786531

 src/MediaPage.vala |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/MediaPage.vala b/src/MediaPage.vala
index a2d5185..d9084f3 100644
--- a/src/MediaPage.vala
+++ b/src/MediaPage.vala
@@ -816,14 +816,15 @@ public abstract class MediaPage : CheckerboardPage {
             restore_point = get_view().get_next(cursor) as CheckerboardItem;
         }
 
+        if ((restore_point != null) && (get_view().contains(restore_point))) {
+            set_cursor(restore_point);
+        }
+
         if (get_view().get_selected_count() > 0) {
             get_command_manager().execute(new TrashUntrashPhotosCommand(
                 (Gee.Collection<MediaSource>) get_view().get_selected_sources(), true));
         }
 
-        if ((restore_point != null) && (get_view().contains(restore_point))) {
-            set_cursor(restore_point);
-        }
     }
 
     protected virtual void on_edit_title() {