csharp parser wip

diff --git a/src/GraphicObjects/DockStack.cs b/src/GraphicObjects/DockStack.cs
index bfd3ac9a325f29891ba804a3090918ebcd433c5b..e9a5348601d533bd5dda1afd271a02932929d21d 100644 (file)
--- a/src/GraphicObjects/DockStack.cs
+++ b/src/GraphicObjects/DockStack.cs
@@ -204,6 +204,8 @@ namespace Crow
                        }
 
                        DockWindow dw = IFace.DragAndDropOperation.DragSource as DockWindow;
+                       if (dw == null)
+                               return;
                        if (!dw.IsDocked) {
                                Rectangle cb = ClientRectangle;
                                double minDim = Math.Min (cb.Width, cb.Height);