patch 9.0.1737: Calling a base class method through an extended class fails Commit: https://github.com/vim/vim/commit/b102728c204430b16a5d9e6720c882e12a687570 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Sat Aug 19 11:26:42 2023 +0200 patch 9.0.1737: Calling a base class method through an extended class fails Problem: Calling a base class method through an extended class fails Solution: Create lookup table for member index in the interface to to the member class implementing the interface Create additional tests for Vim9 classes. Fix unconvered memory leaks and crashes found by the new tests. closes: #12848 closes: #12089 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>author