patch 9.0.2159: screenpos() may crash with neg. column Commit: https://github.com/vim/vim/commit/ec54af4e26952d954a4cc009f62c80ea01445d30 Author: zeertzjq <zeertzjq@outlook.com> Date: Tue Dec 12 16:43:44 2023 +0100 patch 9.0.2159: screenpos() may crash with neg. column Problem: screenpos() may crash with neg. column Solution: validate and correct column closes: #13669 Signed-off-by: zeertzjq <zeertzjq@outlook.com> Signed-off-by: Christian Brabandt <cb@256bit.org>

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|5| @32|4+0#0000001#ffd7ff255@1| @3| +0#0000000#0000001| +0&#ffffff0@33
|6| @32|5+0#0000001#ffd7ff255| @4| +0#0000000#0000001| +0&#ffffff0@33
|7| @32|6+0#0000001#ffd7ff255@5| +0#0000000#a8a8a8255| +0&#ffffff0@33
|8| @73
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