implement Davi's review suggestions (post-push fixes)


include/violite.h:
  Use official abbreviation for milliseconds (ms)
sql/mysqld.cc:
  Fix formatting
  Add error handling for the case of CreateEvent error
vio/vio.c:
  Use official abbreviation for milliseconds(ms)
  Remove superfluous memset
  Fix formatting
vio/viosocket.c:
  Use official abbreviation for milliseconds (ms)
  Use size_t  datatype instead of int in pipe_complete_io