[RFA] Arm/Thumb tweak for generic_dummy_frames

[Richard Earnshaw]

msnyder@cygnus.com said:
>  This is a corner case that Andrew missed when he did the transition
> to generic dummy frames.

> 2002-05-21  Michael Snyder  <msnyder@redhat.com>

> 	* arm-tdep.c (arm_frame_chain): Recognize dummy-frame as a
> 	special case that does not indicate a transition from arm
> 	to thumb or vice versa. 

I can't (easily) work out from this what was wrong, and how you've fixed 
it.  Could you provide some more detailed analysis?  Why would a dummy 
frame never involve a transition between ARM and Thumb state?

R.