[gtkmm] TreeView class

["Andrew E. Makeev" <andrew solvo ru>]

function

TreeView::move_column_after (TreeViewColumn& column, TreeViewColumn& 
base_column)

should have overload

TreeView::move_column_after (TreeViewColumn& column)

where you should send 0 instead of base_column.gobj () to 
gtk_tree_view_move_column_after.
Also, documentation should refer to that, instead of saying you should 
pass 0 there.

Regards,
-andrew