fix struct member comments
fix struct member comments

a bit smaller diff than #217

bluesquall/lcm,lcm-proj/lcm,lcm-proj/lcm,bluesquall/lcm,lcm-proj/lcm,lcm-proj/lcm,bluesquall/lcm,lcm-proj/lcm,lcm-proj/lcm,bluesquall/lcm,bluesquall/lcm,lcm-proj/lcm,lcm-proj/lcm,bluesquall/lcm,bluesquall/lcm