Change deallocation method to use free

[jordan-walters]

Changed memory deallocation method from 'delete' to 'free'.
allocate uses malloc so deallocate MUST not use delete! It MUST use a matching free.

// Allocation
pointer allocate(size_type num, const void* hint = 0)
{
	return (pointer)malloc(num * sizeof(T));
}

// Deallocation
void deallocate(pointer p, size_type)
{
	free(p);
}