Cleaned up parameter declarations in all simulators to achieve clean compiles on all platforms

Very minor in all cases, but the strange case of swtp_cpu.c
This module used expressions of the form:
   PC = ++PC & ADDRMASK;
Officially, the C language says that expressions which modify the same variable in more than one place have undefined behavior.
These were changed to the legal form which performs the desired action:
   PC = (PC + 1) & ADDRMASK;
32 files changed