Allow opening a new code completion window inside ICompletionList.Complete() method.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@3942 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/CodeEditor.cs

@@ -147,8 +147,14 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		
 		internal void NotifyCompletionWindowOpened(CompletionWindow window)
 		{
+			if (completionWindow != null) {
+				// if there already is a completion window open, close it
+				completionWindow.Close();
+			}
 			completionWindow = window;
-			window.Closed += delegate { completionWindow = null; };
+			window.Closed += delegate {
+				completionWindow = null;
+			};
 		}
 		
 		IFormattingStrategy formattingStrategy;