musescore/MuseScore — pull request #118 by mgavioli (2012-11-02 09:06:49+00:00)
Title: Fix bar line management for mensurstrich special case

In mensurstrich bar lines, lines span 2 staves, but the 2nd staff needs its own bar lines kept, in order to allow mensurstrich bars from it to the following staff, if any.

Previous code deleted them unconditionally. This fix keeps the bar lines of a spanned staff, if they stop at the top staff line, without entering into the staff proper.