utf8lookup
leaf = utf8lookup(tree, hangul, key);
static utf8leaf_t *utf8lookup(struct tree *, unsigned char *, const char *);
leaf = utf8lookup(tree, hangul, s);
leaf = utf8lookup(tree, hangul, s);
leaf = utf8lookup(tree, hangul, s);
leaf = utf8lookup(u8c->tree, u8c->hangul, u8c->s);
leaf = utf8lookup(u8c->tree, u8c->hangul, u8c->s);
leaf = utf8lookup(u8c->um, u8c->n, u8c->hangul, u8c->s);
leaf = utf8lookup(u8c->um, u8c->n, u8c->hangul, u8c->s);