Melismatic bug

[Roy . Rankin]

Since 1.3.71  I have been seeing the following warning:

warning: Huh? Melismatic note found to have associated lyrics.

I have now both traced it down to a small example (which is attached)
and see that as a result of this problem the word "and" is not properly
aligned with it's note in this example.  I.E rather than being centered
on the note it is to the right of the note.

Regards,
Roy Rankin

%\version "1.3.92"
voiceW = \notes {
        r4. r8 a'8 b'4 c''8 | d''4 c''8 a'8 b'4. g'8
}
voiceM = \notes {
        \property Voice.automaticMelismata = ##t
        b'4. () g'8 a'2 ~ | a'2 s2 
}
wordsW = \lyrics { Stand up and stand by our u- nion! }
wordsM = \lyrics { u- nion! }
\score {
        <
          \addlyrics
          \context Staff = W {  \$voiceW }
          < \context Lyrics = W \$wordsW >

          \addlyrics
          \context Staff = M { \$voiceM }
          < \context Lyrics = M \$wordsM >
        >
}