Hangul composition check boundaries are wrong for the second character
([0x1161, 0x1176) instead of [0x1161, 0x1176]) and third character ((0x11A7, 0x11C3)
instead of [0x11A7, 0x11C3])..
(cherry picked from commit d134809c)
Co-authored-by: Wonsup Yoon <pusnow@me.com>