Fixed compile error for ATtinyX5.
Fixed compile error for ATtinyX5.

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