[longomatch] Replace ifdef's with runtime detection

[Andoni Morales Alastruey <amorales src gnome org>]

commit c969570480afc2aa97f6e5cc9ffc6c49e1d32e65
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Thu May 7 19:47:29 2015 +0200

    Replace ifdef's with runtime detection

 LongoMatch.GUI/Gui/MainWindow.cs |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/MainWindow.cs b/LongoMatch.GUI/Gui/MainWindow.cs
index 51366a4..ee74eb2 100644
--- a/LongoMatch.GUI/Gui/MainWindow.cs
+++ b/LongoMatch.GUI/Gui/MainWindow.cs
@@ -62,9 +62,9 @@ namespace LongoMatch.Gui
                        Rectangle monitor_geometry = screen.GetMonitorGeometry (monitor);
                        // Resize to a convenient size
                        this.Resize (monitor_geometry.Width * 80 / 100, monitor_geometry.Height * 80 / 100);
-#if OSTYPE_OS_X
-                       this.Move (monitor_geometry.Width * 10 / 100, monitor_geometry.Height * 10 / 100);
-#endif
+                       if (Utils.RunningPlatform () == PlatformID.MacOSX) {
+                               this.Move (monitor_geometry.Width * 10 / 100, monitor_geometry.Height * 10 / 
100);
+                       }
                }
 
                #endregion