[patch/rfc] Add frame_register(); GET_SAVED_REGISTER() is a predicate

[Andrew Cagney]

> 2002-11-01  Andrew Cagney  <cagney@redhat.com>
> 
> 	* gdbarch.sh (GET_SAVED_REGISTER): Change to a predicate function.
> 	* gdbarch.h, gdbarch.c: Regnerate.
> 	* valops.c (value_assign): Use frame_register_read instead of
> 	get_saved_register.
> 	(value_assign): Use frame_register instead of get_saved_register.
> 	* frame.h (frame_register): Declare.
> 	* frame.c (frame_register): New function.
> 	(get_saved_register): Test GET_SAVED_REGISTER_P before calling
> 	GET_SAVED_REGISTER.
> 	(frame_register_read): Use frame_register instead of
> 	get_saved_register.
> 
FYI, I've checked this in.

Andrew