Patch for fix-header crashes

[Kaveh R. Ghazi]

 > From: Zack Weinberg <zack@wolery.cumb.org>
 > 
 > This patch fixes a number of bugs any of which could have caused
 > fix-header to crash.  There were basically two problems: not checking
 > the return value of cpp_file_buffer, and assuming that tokens were
 > nul-terminated (which they were sometimes, but not always).
 > 
 > This may cause more bugs to crawl out of the woodwork, because tokens
 > are never nul-terminated now.  It did pass bootstrap and regression.
 > I won't commit it until it manages to compile glibc and X.
 > zw

This morning's CVS, which contains this patch, works for me on
solaris2.7, AIX4, OSF4 and Irix6, (where previously it didn't.)

Thanks Zack.

		--Kaveh
--
Kaveh R. Ghazi			Engagement Manager / Project Services
ghazi@caip.rutgers.edu		Qwest Internet Solutions