971016: EH frame_init trouble on Sparc

[H.J. Lu]

> 
> I attempted to throw exceptions in a large C++ application
> using snapshot 971016, and ran into trouble.
> 
> The problem is that find_fde calls frame_init if pc_begin is zero.
> However, frame_init finds the lowest pc_begin as zero, causing
> the application to hang and eventually crash.  I think it is doing
> initializations over and over again, and frame_init keeps allocating
> more and more memory.
> 

Please check my email "A frame.c patch". I ran into the same
problem.


H.J.