Fix warning about reaching end of non-void function.
Fix warning about reaching end of non-void function.

huskyroboticsteam/2014-15,lolisa/2014-15,huskyroboticsteam/2014-15,ulrichard/Adafruit-GPS-Library,lolisa/2014-15,huskyroboticsteam/2014-15,adafruit/Adafruit-GPS-Library,tonesandtones/Adafruit-GPS-Library,kaaLabs15/Adafruit-GPS-Library,lolisa/2014-15