grace + multiple staves = multiple time sigs

[Eugene Cormier]

> I'm not top posting.

I'm pretty sure you guys already know about this, but I can't seem to find it 
on the bug tracker.

If you have multiple staves with a time sig change and grace at the same time 
we get duplicated time sigs:

<<
  \new Staff { \time 4/4 c''1 \time 3/4 c''2. }
  \new Staff { \time 4/4 c''1 \time 3/4 \grace b'8 c''2. }
>>

For now I've been getting around the problem by putting the time sig change 
in only the staff with the grace

<<
  \new Staff { \time 4/4 c''1 c''2. }
  \new Staff { \time 4/4 c''1 \time 3/4 \grace b'8 c''2. }
>>

But obviously this will cause problems in a larger work with score and parts

Eugene