+ Knob: avoid zero-LED frames for bipolar knob (I will fix the frames later,   but they're on the other PC)
+ Knob: avoid zero-LED frames for bipolar knob (I will fix the frames later,
  but they're on the other PC)


git-svn-id: 57278f1e1a1e24dc80487329b15e533cf82905b2@212 78b06b96-2940-0410-b7fc-879d825d01d8

zamaudio/calf-LR4,adiknoth/calf,adiknoth/calf,zamaudio/calf-LR4,jnetterf/calf,adiknoth/calf,jnetterf/calf,jnetterf/calf,adiknoth/calf,zamaudio/calf-LR4,zamaudio/calf-LR4,jnetterf/calf,adiknoth/calf,jnetterf/calf,zamaudio/calf-LR4