Problem with unfoldRepeats and tremolos

[Steven Weber]

> I'm not top posting.

Windows XP, Lilypond 2.11.21

Lilypond is converting the tremolos into 16th notes instead of 8ths when in a 
unfoldRepeats block (and you get a barline check failure).  If you comment out 
the \unfoldRepeats line, then the output is as expected (and you don't get a 
barline check failure).

\version "2.11.21"
\paper{ ragged-right=##t }

\unfoldRepeats
{
        \repeat "tremolo" 4 { c'8 } \repeat "tremolo" 4 { c'8 } |
}