#12 Latch Mode stopped working in 0.6.1

[Frank]

Reported on the users mailing list by Alois Cochard.
After check, when in latch mode, the first played note keeps on playing forever, while new notes do not replace the first note and are not stored when latched.

[Frank]

Should be fixed with git commit b4ecd1e75284baf3f58fa4f06bacc01500d5f0b5