Arc apps on Ansible don't ever clear the LEDs

[AaronMeyers]

I just noticed that with the latest libavr32, the arc apps (Cycles, Levels) on Ansible seem to never clear the LEDs which makes them pretty much impossible to use. I managed to track down the commit where it starts happening: 89291aa

i couldn't build from the two commits from @boqs before that because the compiler had some errors, but the issue wasn't present before those commits.

Maybe it has something to do with this commit? c5a6cb1

[scanner-darkly]

yeah, this is due to c5a6cb1 change.

this line doesn't have the intended effect anymore:
https://github.com/monome/ansible/blob/master/src/ansible_arc.c#L932

it should be changed to memset(monomeLedBuffer,0,MONOME_MAX_LED_BYTES);

there are several places in there that need to be changed. ansible_grid.c from a quick look just uses 128 but i would check it as well.

[tehn]

fixed by monome/ansible#30