Prevent Boo forms designer from changing the type of fields to 'void'

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@4014 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/AbstractDesignerGenerator.cs

@@ -342,6 +342,12 @@ namespace ICSharpCode.FormsDesigner
 				// ignore type changes to untyped VB fields
 				return false;
 			}
+			if (newType.BaseType == "System.Void") {
+				// field types get replaced with System.Void if the type cannot be resolved
+				// (e.g. generic fields in the Boo designer which aren't converted to CodeDom)
+				// we'll ignore such type changes (fields should never have the type void)
+				return false;
+			}
 			
 			ArrayReturnType oldArray = oldType.IsArrayReturnType ? oldType.CastToArrayReturnType() : null;
 			if (oldArray == null ^ newType.ArrayRank < 1)