OutlineView should decode a new instance of tableview delegate

AppKit/CPOutlineView.j

@@ -1724,6 +1724,7 @@ var CPOutlineViewIndentationPerLevelKey = @"CPOutlineViewIndentationPerLevelKey"
         _outlineViewDelegate = [aCoder decodeObjectForKey:CPOutlineViewDelegateKey];
 
         [super setDataSource:[[_CPOutlineViewTableViewDataSource alloc] initWithOutlineView:self]];
+        [super setDelegate:[[_CPOutlineViewTableViewDelegate alloc] initWithOutlineView:self]];
     }
 
     return self;