[longomatch] Fix casts in messages

[Andoni Morales Alastruey <amorales src gnome org>]

commit ad479fdb0f5fbf12cb33d2ec7c9e821fa4036567
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Wed Apr 1 19:34:37 2015 +0200

    Fix casts in messages

 LongoMatch.GUI.Helpers/MessagesHelpers.cs |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/LongoMatch.GUI.Helpers/MessagesHelpers.cs b/LongoMatch.GUI.Helpers/MessagesHelpers.cs
index a4dbcd6..484f90a 100644
--- a/LongoMatch.GUI.Helpers/MessagesHelpers.cs
+++ b/LongoMatch.GUI.Helpers/MessagesHelpers.cs
@@ -69,7 +69,7 @@ namespace LongoMatch.Gui.Helpers
                        int ret;
                        
                        if (sender != null)
-                               toplevel = (Window)sender.Toplevel;
+                               toplevel = sender.Toplevel as Window;
                        else
                                toplevel = null;
 
@@ -90,7 +90,7 @@ namespace LongoMatch.Gui.Helpers
                        Window parent;
                        
                        if (sender != null)
-                               parent = (Window)sender.Toplevel;
+                               parent = sender.Toplevel as Window;
                        else
                                parent = null;