[Bug d/99337] Sanitizer detect heap-buffer-overflow in checkModFileAlias

[ibuclaw at gdcproject dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99337

--- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Thanks, committed, and I'll apply it to gcc-10 and gcc-9 as well, as they have
the same condition.