[dconf-editor] Nullable annotation.

[Arnaud Bonatti <arnaudb src gnome org>]

commit e50f6c51ec4417aac0c2f2599ec41b4310739eb8
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Aug 12 11:56:17 2016 +0200

    Nullable annotation.

 editor/registry-view.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/editor/registry-view.vala b/editor/registry-view.vala
index 9e0926b..53f06c2 100644
--- a/editor/registry-view.vala
+++ b/editor/registry-view.vala
@@ -81,7 +81,7 @@ class RegistryView : Grid, PathElement
         if (selected != null)
         {
             check_resize ();
-            ListBoxRow row = key_list_box.get_row_at_index (get_row_position ((!) selected));
+            ListBoxRow? row = key_list_box.get_row_at_index (get_row_position ((!) selected));
             if (row == null)
                 assert_not_reached ();
             scroll_to_row ((!) row);