Bug in Accumulator modulator: goes infinite loop when velocity is zero

[jkbelcher]

If the velocity parameter in an Accumulator returns zero, the Accumulator should sit at current value and not increase. Instead it goes infinite loop and freezes the UI.

https://github.com/heronarts/LX/blob/dev/src/main/java/heronarts/lx/modulator/Accumulator.java#L74

[mcslee]

Gruesome! 🤮

Thx for catching.

[mcslee]

d2d23e1

Not the most elegant fix, could still get stuck but at least won't hang the whole program.