Fix tests
Add a way to detect CrashDetect from Pawn

Executing LCTRL 0xFF now will always set PRI to 1. If CrashDetect is
not running the VM will just do nothing.

Example usage:

new cd;
#emit zero.pri
#emit lctrl 0xFF
#emit stor.s.pri cd
print((cd)? ("yes"): ("no"));
Add subhook