backport unwind fixes to 3.3

[Nicholas Wourms]

Richard Henderson wrote:
> On Fri, Jun 06, 2003 at 02:42:25PM -0400, Nicholas Wourms wrote:
> 
>>Is it just me or did this patch get truncated?  I've checked the 
>>archives and GMANE, both are cut off at the same place.
> 
> 
> It's not cut off.  A frag that just removes lines
> doesn't have a "new" part.

Sorry, I guess my mind was stuck in unified diff mode :-/ ...

Cheers,
Nicholas