Method trimToSize

Sming/Wiring/WVector.h:206–211

* @brief Reduce capacity to match current size */

	 * @brief Reduce capacity to match current size
	 */
	void trimToSize()
	{
		if(_size < _data.size) {
			_data.trim(_size, true);
		}
	}

	const Element& elementAt(unsigned int index) const
	{