final barline bug

[David Bobroff]

This file exhibits a bug in 2.1.25.  The final group barline connecting
the staves is shifted to the right by its own width.

\version "2.1.25"

one = \notes \relative c {
    c4 d e f g a b c \bar "|."
}

two = \notes \relative c {
    c4 d e f g a b c \bar "|."
}
\score { \notes \transpose c c {
    \context StaffGroup = Score <<
        \one
        \two
         >> }
         \paper {}
     }