Fix CVE-2022-1154: Use after free in utf_ptr2char in GitHub repository vim/vim prior to 8.2.4646. Fix CVE-2022-1160: heap buffer overflow in get_one_sourceline in GitHub repository vim/vim prior to 8.2.4647. Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>