[longomatch] Fixes Gtk-CRITICAL **: void gtk_entry_set_text(GtkEntry *, const gchar *): assertion 'text != NULL'

[Andoni Morales Alastruey <amorales src gnome org>]

commit b3c2d126bc1091dcddbf9241b14ef95f4e4c13d1
Author: Josep Torra <n770galaxy gmail com>
Date:   Mon Apr 27 12:56:06 2015 +0200

    Fixes Gtk-CRITICAL **: void gtk_entry_set_text(GtkEntry *, const gchar *): assertion 'text != NULL' failed

 LongoMatch.GUI/Gui/Component/MediaFileChooser.cs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs 
b/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs
index 6466ca2..6778ef8 100644
--- a/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs
+++ b/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs
@@ -41,7 +41,7 @@ namespace LongoMatch.Gui.Component
 
                        // The name entry is only visible when not empty
                        nameentry.Visible = !String.IsNullOrEmpty (name);
-                       nameentry.Text = name;
+                       nameentry.Text = name ?? "";
 
                        addbuttonimage.Pixbuf = Helpers.Misc.LoadIcon ("longomatch-browse", 
Gtk.IconSize.Button, 0);
                        clearbuttonimage.Pixbuf = Helpers.Misc.LoadStockIcon (clearbuttonimage, "gtk-clear", 
Gtk.IconSize.Button);