patch 9.0.1543: display errors when making topline shorter Commit: https://github.com/vim/vim/commit/5d01f86d99bc3a3fd92d4f4e9338a9e78e9ebe16 Author: Luuk van Baal <luukvbaal@gmail.com> Date: Thu May 11 19:24:20 2023 +0100 patch 9.0.1543: display errors when making topline shorter Problem: Display errors when making topline shorter and 'smoothscroll' is set. Solution: Reset w_skipcol when the topline becomes shorter than its current value. (Luuk van Baal, closes #12367)

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