[Bug modula2/101388] Unconditional use of __MAX_BAUD

[gaiusmod2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101388

--- Comment #5 from Gaius Mulley <gaiusmod2 at gmail dot com> ---
Many thanks - I've applied the patch to the git repro.  Fixed now I believe.