2.4.2: more percent repeat problems

[Bruce McIntyre]

Hello,

I've noticed two new issues with two-bar percent repeats.

1. If a two-bar percent-repeat is at the start of a piece,
lilypond cannot continue:
 warning: no one to print a percent:
    \repeat percent 2 {\twobar
                              }

Either substituting \onebar for \twobar, or uncommenting the f1 will
allow lilypond to produce output

2. When a multimeasure rest follows a two-bar percent repeat, it gets
broken-up into it's component bars, regardless of Score.skipBars.
When I first came upon this bug there was a bar of music separating
the percent repeats and the multimeasure rest, and the multimeasure
rest was still broken.

Uncomment the f1 to see this bug. The example works fine with \onebar
in the percent repeat.

8<------8<------8<------8<------8<------8<------8<------8<-------

\version "2.4.2"
twobar = \relative c' {
  \clef treble
  c1 | c1
}
onebar = \relative c' {
c1
}
\score {
  \new Staff {
 \set Score.skipBars = ##t
  %  f1
    \repeat percent 2 {\twobar}
  R1*3 }
}

Cheers,

Bruce.