close directory after reading entries

otherwise the filedescriptor keeps open which prevents a
smooth unmounting as long as subsurface is open

Signed-off-by: Martin Gysel <me@bearsh.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

uemis-downloader.c

@@ -88,6 +88,7 @@ static int number_of_file(char *path)
 	GDir *dir = g_dir_open(path, 0, NULL);
 	while (g_dir_read_name(dir))
 		count++;
+	g_dir_close(dir);
 	return count;
 }