Function join

src/core/filesystem/path.cpp:62–71

	}

	void join(DynamicString &path, const StringView &path_a, const StringView &path_b)
	{
		const u32 la = path_a.length();
		const u32 lb = path_b.length();
		path.reserve(la + lb + 1);
		path  = path_a;
		if (la != 0 && lb != 0)
			path += PATH_SEPARATOR;
		path += path_b;
	}

	void join(DynamicString &path, const char *path_a, const char *path_b)
	{