* Fix wrong sync after UC_ERR_[READ, WRITE, FETCH]_[UNMAPPED, PROT]
Note that:
1. We only guarantee the pc (and other internal states) is correct
if and only of `uc_emu_start` returns without any error (or errors
have been handled in callbacks.).
2. If memory read/write error isn't handled by hooks, the state is
undefined and the pc is probably wrong if no hook is installed.
This fixes#1323.
* Rename variables
* Add note in unicorn.h
* Refine test_i386_invalid_mem_read_in_tb
225d387325