Small build fix

SuicSoft · SuicSoft · commit 2169ed6960e0 · 2015-10-27T16:42:21.000+05:30
diff --git a/MaterialDesignThemes.Wpf/PaletteHelper.cs b/MaterialDesignThemes.Wpf/PaletteHelper.cs
@@ -5,6 +5,7 @@
 using System.Windows;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
+using System.Runtime.InteropServices;
 namespace MaterialDesignThemes.Wpf
 {
     public class PaletteHelper

Original file line number	Diff line number	Diff line change
`@@ -5,6 +5,7 @@`
`5`	`5`	`using System.Windows;`
`6`	`6`	`using System.Windows.Media;`
`7`	`7`	`using System.Windows.Media.Animation;`
	`8`	`+using System.Runtime.InteropServices;`
`8`	`9`	`namespace MaterialDesignThemes.Wpf`
`9`	`10`	`{`
`10`	`11`	`public class PaletteHelper`