Hello,

This patch introduces a new function:

	int pc_in_dummy_frame (CORE_ADDR pc);

The file frame.c is then updated to use either it, or (get_frame_type() 
== DUMMY_FRAME).  The old generic_pc_in_call_dummy() took both a PC and 
an FP/SP, or generic dummy frames though (which all architectures should 
be using)

There is a problem though (and I only noticed after committing it :-().

The change assumes that all architectures that use generic dummy frames 
also set PC_IN_CALL_DUMMY to generic_pc_in_call_dummy() (and hence 
eventually call this new pc_in_dummy_frame).  Problem is, some don't:
	cris, frv, i386, x86-64
They instead use pc_in_call_dummy_at_entry_point().  Now, in theory, 
generic_pc_in_call_dummy() and pc_in_call_dummy_at_entry_point() are 
equivalent, I'm not going to put money on it though.  Hence, expect a 
follow up patch to revert a small part of this change.

Andrew