[bot] Implement/match n_GetPlayerVehicleID(...)

* Implement/match `CNetGame::GetPlayerVehicleID(...)`

bot/net/netgame.cpp

@@ -100,6 +100,25 @@ BOOL CNetGame::GetPlayerPos(PLAYERID playerId, PVECTOR Vector)
 	return FALSE;
 }
 
+VEHICLEID CNetGame::GetPlayerVehicleID(PLAYERID playerId)
+{
+	if(playerId >= MAX_PLAYERS) return INVALID_VEHICLE_ID;
+	if(bPlayerSlotState[playerId] == FALSE) return INVALID_VEHICLE_ID;
+
+	if(bytePlayerState[playerId] == PLAYER_STATE_DRIVER)
+	{
+		return unnamed_4[playerId].VehicleID;
+	}
+	else if(bytePlayerState[playerId] == PLAYER_STATE_PASSENGER)
+	{
+		return unnamed_5[playerId].VehicleID;
+	}
+	else
+	{
+		return INVALID_VEHICLE_ID;
+	}
+}
+
 //----------------------------------------------------
 // MATCH
 BOOL CNetGame::IsPlayerAdded(PLAYERID playerId)

bot/net/netgame.h

@@ -109,6 +109,7 @@ public:
 	void SetPlayerState(PLAYERID playerId, BYTE byteState);
 	BYTE GetPlayerState(PLAYERID playerId);
 	BOOL GetPlayerPos(PLAYERID playerId, PVECTOR Vector);
+	VEHICLEID GetPlayerVehicleID(PLAYERID playerId);
 	void StopRecordingPlayback();
 	void PauseRecordingPlayback();
 	void ResumeRecordingPlayback();

bot/scrcustom.cpp

@@ -166,7 +166,10 @@ static cell AMX_NATIVE_CALL n_GetPlayerPos(AMX *amx, cell *params)
 // native GetPlayerVehicleID(playerid)
 static cell AMX_NATIVE_CALL n_GetPlayerVehicleID(AMX *amx, cell *params)
 {
-	// TODO: n_GetPlayerVehicleID
+	if(pNetGame->GetPlayerPool()->GetSlotState((PLAYERID)params[1]))
+	{
+		return pNetGame->GetPlayerVehicleID((PLAYERID)params[1]);
+	}
 	return 0;
 }