Why does lint foul up on #if 0

[John Gilmore]

I believe this is a cpp bug.  Lint is a shell script -- try catting it.
It invokes "cpp -C -Dlint" on your files and processes the output.
The -C is to keep the comments (eg, /*NOTREACHED*/).  However, some versions
of cpp have a bug where a comment on an #if screws up.  This never
bothers the compiler since it asks that cpp strip comments anyway, but
shows up for lint.

There's probably a relatively trivial fix for this problem in cpp but
I don't have it at hand.  Any volunteers?