Bug in ConvexHull::Delete

`cpp
template<typename Point_2D>
inline void ConvexHull<Point_2D>::Delete(Point_2D p)
{
	if (!root)
		return;
	else if (root->getIsLeaf()) {
		DeleteFromLeaf(root, p);
	}
	else {
		DeleteAt(root, p);
	}
}
template<typename Point_2D>
inline void ConvexHull<Point_2D>::DeleteAt(Point_2D p)
`
DeleteAt takes one argument but called with two. 