[myank] Pickups do not work

[WolfgangDrescher]

When I try to use e.g. cat test.krn | myank -l 2-10 on a file with a pickup before the first measure the command will fail and actually output the whole kern data and does not yank anything.

test.krn

**kern
4e
=1
4a
4g
4f
4e
=2
2d
4e
4b
=3
4cc
4cc
4b
4b
=4
1a;
==
*-

Expected output with myank -l 2-10

**kern
4e
=1
4a
4g
4f
4e
=2
2d
4e
*-

I tried to debug this, but I don't yet understand fully the logic of MeasureInfo and where it does get hydrated. It looks like in Tool_myank::processFile the expandMeasureOutList function does not assign anything to m_measureOutList. Would it make sense to add an additional MeasureInfo element that contains all notes before the first bar number (e.g. as NUMBER = 0 or NUMBER = -1) at the beginning of the vector?