Fix DUE parallel output when there are fewer than 8 lanes.
Fix DUE parallel output when there are fewer than 8 lanes.

FastLED/FastLED,PaulStoffregen/FastLED,FastLED/FastLED,tullo-x86/FastLED,PaulStoffregen/FastLED,remspoor/FastLED,remspoor/FastLED,eshkrab/FastLED-esp32,tullo-x86/FastLED,FastLED/FastLED,PaulStoffregen/FastLED,kcouck/FastLED,kcouck/FastLED,eshkrab/FastLED-esp32,FastLED/FastLED