[Bug c++/95700] read-md.c: "missing sentinel in function call" when building gcc with musl

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95700

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> I don't think it is a good idea to allow (uintptr_t) 0 as valid sentinel.

Definitely not. (uintptr_t)0 is not a null pointer constant, and is not a valid
definition of NULL for C++.