Update Adafruit-LEDBackpack.cpp
Update Adafruit-LEDBackpack.cpp
therrewi/Spark_Adafruit_LEDBackpack,creationix/spark-adafruit-led-backpack,epec254/BCG_LED_Library,beefbowl/Spark_Adafruit_LEDBackpack,PEstes/spark-adafruit-led-backpack