Fix assert() condition for ChoiceInfoAppendChi()

Signed-off-by: Jim Huang <jserv@0xlab.org>
mod_aux.h: Fix typo in filename declaration

Signed-off-by: Jim Huang <jserv@0xlab.org>
Fix typo in chewing_commit_Check() description

Signed-off-by: Jim Huang <jserv@0xlab.org>