Adds detection for writing to address 0 (not always an error) and flags to control it.:
# Address Naught
Often writing to address naught is a mistake, it indicates that some target address is unset,
especially in larger modes. `address_naught` mode detects all writes to this address and gives a
new (to VM) error in that case - `AMX_ERR_ADDRESS_0`. Note that this isn't always an error, it is a
valid address and real data can be stored there, so if this detection is enabled the mode must
ensure that nothing important will be written there (fixes.inc does this by defining and not using
the anonymous automata).
## Functions
There are several functions in the include to use these tests:
* `DisableCrashDetectAddr0();` - Disable address naught write detection in this mode.
* `EnableCrashDetectAddr0();` - Enable address naught write detection in this mode.
* `bool:IsCrashDetectAddr0Enabled();` - Is the error currently enabled?
* `bool:HasCrashDetectAddr0();` - Does the current version of crashdetect support this feature?
Adds detection for writing to address 0 (not always an error) and flags to control it.:
This also cleaned up some other register uses.