native SetPackPosition(DataPack:pack, DataPackPos:position);
New position to set
Sets the datapack read/write position.
This should only ever be used with (known to be valid) positions
returned by GetPackPosition(). It is not possible for plugins to safely
compute datapack positions.
This function has no return value.
If an invalid handle is provided, or the new position is
out of datapack bounds, an error will be thrown.