patch 8.2.4833: failure of mapping not checked for Commit: https://github.com/vim/vim/commit/12e21e387b5bbc928097abf1c189b7dc665838fc Author: zeertzjq <zeertzjq@outlook.com> Date: Wed Apr 27 11:58:01 2022 +0100 patch 8.2.4833: failure of mapping not checked for Problem: Failure of mapping not checked for. Solution: Check return value of ins_typebuf(). (closes https://github.com/vim/vim/issues/10299)

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