[longomatch] Turn the compile-time check for Windows into a runtime check, when working around a problem in Gtk r

[Andoni Morales Alastruey <amorales src gnome org>]

commit f76774e1d0d8d8a8e515cd0963b363cac0262431
Author: Xavi Artigas <xartigas fluendo com>
Date:   Thu Mar 19 17:11:17 2015 +0100

    Turn the compile-time check for Windows into a runtime check, when working around a problem in Gtk 
regarding the video window visibility.

 LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs b/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs
index 0cb8e92..b5d1393 100644
--- a/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs
+++ b/LongoMatch.GUI.Multimedia/Gui/VideoWindow.cs
@@ -41,10 +41,10 @@ namespace LongoMatch.Gui
                        videoeventbox.ButtonPressEvent += HandleButtonPressEvent;
                        videoeventbox.ScrollEvent += HandleScrollEvent;
                        videoeventbox.BorderWidth = 0;
-#if OSTYPE_WINDOWS
-                       // Workaround for GTK bugs on Windows not showing the video window
-                       videoeventbox.VisibilityNotifyEvent += HandleVisibilityNotifyEvent;
-#endif
+                       if (Environment.OSVersion.Platform == PlatformID.Win32NT) {
+                               // Workaround for GTK bugs on Windows not showing the video window
+                               videoeventbox.VisibilityNotifyEvent += HandleVisibilityNotifyEvent;
+                       }
 
                        frame.Add (Window);
                        videoeventbox.Add (frame);