Bug#892077: rakarrack: Segfaults after jackd upgrade

[BenWiederhake.GitHub]

Hello,

my best guess is that in Looper.C:63, the access of the field `Ppreset` 
reads uninitialized memory.

Manual workaround: Add `Ppreset = 0;` at the top and hope that this 
value makes any sense.

Works for me.

Cheers,
Ben Wiederhake