Region Bugs

[xFrednet]

On regions-main

1. This correctly raises an error about regions not being freezable, but it crashes in some C layers too.

   r = Region()
   class A:
       def foo(self):
           r
   freeze(A)
   

2. Some Unary operators |=, *= etc have an LRC off by one error

3. Calling built-in C functions like id have an LRC off by one error