Function find_root_unit

src/resource/unit_compiler.cpp:697–709

	}

	static Unit *find_root_unit(UnitCompiler &c, u32 root_unit_index)
	{
		auto cur = hash_map::begin(c._units);
		auto end = hash_map::end(c._units);
		for (; cur != end; ++cur) {
			HASH_MAP_SKIP_HOLE(c._units, cur);

			if (cur->second->_index == root_unit_index)
				return cur->second;
		}

		return NULL;
	}

	static Unit *find_unit_by_index(Unit *unit, u32 unit_index)
	{