[RFA] Revise assertion in frame_saved_regs_register_unwind()

[Kevin Buettner]

On Aug 9, 11:27am, Andrew Cagney wrote:

> > 	* blockframe.c (frame_saved_regs_register_unwind): Revise
> > 	PC_IN_CALL_DUMMY_ASSERTION to only apply when generic dummy
> > 	frames are in use.
> 
> Yes.  (Of course all targets should be using generic dummy frames but 
> until then :-).

Committed.