[Bug preprocessor/60736] Crash in preprocessor including stdc-predef.h when it does not exist on glibc-based systems

[ian at airs dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60736

--- Comment #8 from Ian Lance Taylor <ian at airs dot com> ---
I don't think that's the right patch, unless there is a good reason for msgid
to be NULL.  Note that two lines down we are printing msgid, so that would need
to be fixed as well.  But it would be best if msgid were not NULL.