decrescendo mark

[pabuhr]

I want the decrescendo mark to extend from the first bar into the second bar,
ending under the "c,4" node. What do I have to do to make this happen?

\version "2.16.0"

melody = \relative c' {
     \time 2/4
     << { \stemDown d,8\> [ g g, g' ] } \\ { \stemUp b4 b } >> |
     << { \stemDown c,4\! c8 \rest } \\ { \stemUp c'4 c8 \rest } >>
     \bar "||"
}

\score {
     <<
          \context Voice {
               \clef "treble_8"
               \melody
          }
     >>
} % score

% Local Variables: %
% tab-width: 4 %
% compile-command: "lilypond --ps test1.ly" %
% End: %