[Bug modula2/108404] M2RTS_Halt fails with a segv (it should emit a diagnostic and exit).

[gaius at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108404

--- Comment #5 from Gaius Mulley <gaius at gcc dot gnu.org> ---
I've committed the patch above - since the source tree without it definitely
has a  mismatched prototype.  The exit issue needs to be resolved before this
PR can close.