Hello,

This is the next in the series of patches that modify get_prev_frame() 
so that the PC can always be initialized first.

It does the following:

- deprecates INIT_FRAME_PC and changes it to a function with predicate 
(so that DEPRECATED_INIT_FRAME_PC_P() can be used to test for the 
method's presence).

- updates frame.c to use this.

- updates all architectures so that they explicitly set the init frame 
pc function.

Once the final patch in this series (unwind the PC first when creating a 
frame) is committed, architectures will be able to remove the above line 
(after testing of course :-).

I'll look to commit in a few days.

Andrew