[longomatch] Handle nulls in filters

[Andoni Morales Alastruey <amorales src gnome org>]

commit f3d5ca1d9117bd9950932f4a4d737bdbf78668fb
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Fri Dec 16 02:44:38 2011 +0100

    Handle nulls in filters

 LongoMatch.GUI/Gui/GUIToolkit.cs |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/GUIToolkit.cs b/LongoMatch.GUI/Gui/GUIToolkit.cs
index 9d39b5c..e05f0c3 100644
--- a/LongoMatch.GUI/Gui/GUIToolkit.cs
+++ b/LongoMatch.GUI/Gui/GUIToolkit.cs
@@ -291,10 +291,12 @@ namespace LongoMatch.Gui
 				fChooser.SetCurrentFolder(defaultFolder);
 			if (defaultName != null)
 				fChooser.SetFilename(defaultName);
-			filter = new FileFilter();
-			filter.Name = filterName;
-			filter.AddPattern(extensionFilter);
-			fChooser.AddFilter(filter);	
+			if (filterName != null) {
+				filter = new FileFilter();
+				filter.Name = filterName;
+				filter.AddPattern(extensionFilter);
+				fChooser.AddFilter(filter);	
+			}
 			
 			if (fChooser.Run() != (int)ResponseType.Accept) 
 				path = null;