ea-based frame API

These functions replace the func_t*-based frame API with ea_t-based equivalents. More...

Topics
	ea-based frame manipulation
	ea-based stack variables
	ea-based register variables
	ea-based SP change points
	ea-based local labels

Detailed Description

These functions replace the func_t*-based frame API with ea_t-based equivalents.

Using ea_t (the function's start address) as a stable handle avoids pointer lifetime issues: func_t pointers can be invalidated by del_func(), add_func(), undo, and recursive IDB event callbacks.