Fixed TWI::Slave; begin() does not return any value (void).
Fixed TWI::Slave; begin() does not return any value (void).

rrobinet/Cosa,jeditekunum/Cosa,mikaelpatel/Cosa,dansut/Cosa,mikaelpatel/Cosa,dansut/Cosa,jeditekunum/Cosa,kc9jud/Cosa,rrobinet/Cosa,mikaelpatel/Cosa,jeditekunum/Cosa,dansut/Cosa,jeditekunum/Cosa,kc9jud/Cosa,mikaelpatel/Cosa,rrobinet/Cosa,kc9jud/Cosa,kc9jud/Cosa,rrobinet/Cosa,dansut/Cosa