remove pointer to long conversions - part 3 of 3 (trunk only)

remove pointer to long conversions - part 3 of 3 (trunk only)

Remove some more code that forced pointers into a long int, and
vice versa where information could be lost (P64 platforms such as
WIN64 have a 64 bit pointer size, but a 32 bit long size.)

This 3rd part deals with region functions switching
some arguments from type genericptr_t to 'anything'.

Like the previous 2 parts, this needs to increment
 EDITLEVEL in patchlevel.h.