Handbremse - Fahrzeug verlangsamen

#include <a_samp>

native IsValidVehicle(vehicleid);
new timer;

public OnFilterScriptInit(){
	timer = SetTimer("FahrzeugAbbremsen", 100, true);
	return 1;
}
public OnFilterScriptExit(){
	KillTimer(timer);
	return 1;
}

forward FahrzeugAbbremsen();
public FahrzeugAbbremsen()
{
	new Float:x, Float:y, Float:z;
	for(new vid = 1, maxvid = GetVehiclePoolSize(); vid <= maxvid; vid++)
	{
		if(!IsValidVehicle(vid))continue;
		if(!IsAnyPlayerInVehicle(vid))continue;
		//#Abfrage ob das Fahrzeug die Handbremse gezogen hat
		GetVehicleVelocity(vid, x, y, z);
		SetVehicleVelocity(vid, x*0.1, y*0.1, z*0.1);//*0.1 ist die reduzierte Geschwindichtkeit (10% von der alten Geschwindichkeit)
	}
}

stock IsAnyPlayerInVehicle(vid)
{
	for(new playerid = 0, maxplayers = GetPlayerPoolSize(); playerid <= maxplayers; playerid++)
	{
		if(!IsPlayerConnected(playerid))continue;
		if(!IsPlayerInAnyVehicle(playerid))continue;
		if(!IsPlayerInVehicle(playerid, vid))continue;
		return 1;
	}
	return 0;
}