surely this should be IsLess not IsEqual, i.e.
see
 commit 86a3fe47
 Date:   Sat Oct 4 21:36:27 2014 -0500
 coverity#704049 Unchecked return value
and
 commit 3edb1dcd
 Date:   Wed Jun 26 08:32:38 2002 +0000
 #99877# Phonetic sorting for Asian languages

Change-Id: I6c78e388e986577c34b37643a877ab7f5c17b173