\cadenzaOff resets accidentals too late

[James Harkins]

This smells like a bug to me:

\version "2.18.2"
\language "english"

\relative c' {
 \cadenzaOn
 a4 b cs d    % accidental is printed
 \cadenzaOff
 \bar "||" % \time 4/4
 e d cs b    % accidental is NOT printed -- huh??
 a b cs d    % accidental is printed
}

I'm aware that \cadenzaOn will remember accidentals for the entire duration 
of the cadenza. But, I would expect, when the cadenza ends and metered 
music resumes, that the accidentals in force would be cleared. Any notes in 
the subsequent bar that require accidentals would be printed with 
accidentals, even if the same accidental appeared in the cadenza.

In fact, the accidentals are not cleared until the next bar (second bar 
after the cadenza ends).

If I were writing only for C instruments, I would just work around it by 
forcing the missing accidentals by "!". Unfortunately for this case, it's 
an A clarinet part. The accidental is required in the C score, but not 
required for the transposed part. This means that the workaround involves 
tagging notes, so that the score will use "cs!" and the part, just "cs". 
Irritating.

There may be some technical reason for the current behavior, but it means 
that "normal" input produces incorrect output... so I think, bug.

hjh