9032 sgs: this statement may fall through
Reviewed by: Yuri Pankov <yuripv@yuripv.net>
Reviewed by: Andrew Stormont <andyjstormont@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>

6273858 gcc and sgs/error don't get along
6273865 gcc and sgs/m4 don't get along
6273869 gcc and sgs/unifdef don't get along

OpenSolaris Launch