Function duplicate_string

Tools/EditorFramework/pugixml.cpp:6536–6545

	bool _uses_heap;

	static char_t* duplicate_string(const char_t* string, size_t length, xpath_allocator* alloc)
	{
		char_t* result = static_cast<char_t*>(alloc->allocate((length + 1) * sizeof(char_t)));
		assert(result);

		memcpy(result, string, length * sizeof(char_t));
		result[length] = 0;

		return result;
	}

	static char_t* duplicate_string(const char_t* string, xpath_allocator* alloc)
	{