[banshee] Add a missing source file to .csproj

[Gabriel Burt <gburt src gnome org>]

commit c3522151eb6940064cec0cf94a172a077b338bee
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Tue May 19 17:32:59 2009 -0500

    Add a missing source file to .csproj
---
 src/Libraries/Hyena.Gui/Hyena.Gui.csproj |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/Libraries/Hyena.Gui/Hyena.Gui.csproj b/src/Libraries/Hyena.Gui/Hyena.Gui.csproj
index 18bcb70..833f1d2 100644
--- a/src/Libraries/Hyena.Gui/Hyena.Gui.csproj
+++ b/src/Libraries/Hyena.Gui/Hyena.Gui.csproj
@@ -105,6 +105,7 @@
     <Compile Include="Hyena.Gui.Theming\Theme.cs" />
     <Compile Include="Hyena.Gui.Theming\GtkColors.cs" />
     <Compile Include="Hyena.Gui.Theming\ThemeContext.cs" />
+    <Compile Include="Hyena.Gui.Theming\ThemeEngine.cs" />
     <Compile Include="Hyena.Gui.Theming\GtkTheme.cs" />
     <Compile Include="Hyena.Data.Gui\ListView\ListView_DragAndDrop.cs" />
     <Compile Include="Hyena.Gui\PangoCairoHelper.cs" />