aliasing problem with va_arg

[Jim Wilson]

	I suggest that you proceed with your partially implemented
	__builtin_va_arg support.

I am a relatively inactive egcs developer at this time.  If I can't do
something in a few hours, it isn't worthwhile for me to start, as I won't
be able to finish it.  I am just tossing this out as an idea, in case there
is someone else interested in working on this project.  It will likely be a
long time before I have a chance to work on it myself.

I've seen two good ideas on ways to fix the problem within va-sparc.h.  I am
going to try those ideas next.

Jim