[RFA] Fix a "pc ... in psymtab but not in symtab" internal error warning

[Joel Brobecker]

> I am drooling over this documentation you mention.... All I've ever
> seen about mdebug is an old doco from Dave Anderson. Is the one you
> are referring to publically available?

Yes. I have a PDF document written by Compaq that I found on the web.
It's titled "Object file / Symbol Table Format Specification" (version
5.0 or higher, July 1998). I can't find this PDF anymore, but I found
a more recent version of the documentation in HTML format at:

http://www.tru64unix.compaq.com/docs/base_doc/DOCUMENTATION/V51A_HTML/SUPPDOCS/OBJSPEC/NV50XXXX.HTM

> I am not opposed to checking this in. Maybe Daniel J has some machines
> available where he can do some further testing?  Only, I would like to
> see some of the explanantions you wrote above, being included as
> comments in the code.

Ok. Daniel suggested I use the machines from the HP testdrive program.
Hopefully, I'll have some time today and report back with some results
and more comments.

-- 
Joel