FIX: Explosive does not spawn at the correct altitude in fnc_moduleSuicideBomber

[Vdauphin]

When merged this pull request will:

• Use _unit (Object) as position parameter for createVehicle instead of getPos _unit (Position array).
• The bomb spawn at the correct altitude so the player and the suicider are killed as intended.
• basic testing code in debug console :

// On Altis,
player allowdamage false;
player setPosASL [16894.5,13467.2,2.19884];

private _group = createGroup civilian;
private _unit = _group createUnit ["C_Man_casual_5_F", [16900.5,13458.1,2.19796], [], 0, "CAN_COLLIDE"];

createVehicle ["R_TBG32V_F", getPos _unit, [], 0, "CAN_COLLIDE"]; //Nobody is killed
//createVehicle ["R_TBG32V_F", _unit, [], 0, "CAN_COLLIDE"]; //Everybody is killed

[dedmen]

Actual bug here is that getPos returns PositionAGLS but createVehicle want's positionATL.
This fix also makes the script a tiny bit faster ;3

[kymckay]

Good fix