Fix build with MSVC >= 2015
Fix build with MSVC >= 2015

Don't define `snprintf` on MSVC 2015 and later, which (finally) supply
the C99 function correctly.

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