Canonically reorder U+0C55 and U+0C56
diff --git a/src/hb-unicode.hh b/src/hb-unicode.hh
index 80624c0..021fa46 100644
--- a/src/hb-unicode.hh
+++ b/src/hb-unicode.hh
@@ -326,11 +326,11 @@
*
* Modify Telugu length marks (ccc=84, ccc=91).
* These are the only matras in the main Indic scripts range that have
- * a non-zero ccc. That makes them reorder with the Halant that is
- * ccc=9. Just zero them, we don't need them in our Indic shaper.
+ * a non-zero ccc. That makes them reorder with the Halant (ccc=9).
+ * Assign 5 and 6, which are otherwise unassigned.
*/
-#define HB_MODIFIED_COMBINING_CLASS_CCC84 0 /* length mark */
-#define HB_MODIFIED_COMBINING_CLASS_CCC91 0 /* ai length mark */
+#define HB_MODIFIED_COMBINING_CLASS_CCC84 5 /* length mark */
+#define HB_MODIFIED_COMBINING_CLASS_CCC91 6 /* ai length mark */
/* Thai
*
