[Boost-build] typo in common.jam

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-07-12 16:07:45

AMDG

common.jam line 802 in join-tag:
    if ! $(joinder) { joiner = - ; }
I think this is intended to be
    if ! $(joiner) { joiner = - ; }

In Christ,
Steven Watanabe