in number_to_datetime(), zero out the MYSQL_TIME structure
  before setting values, to ensure that all fields are initialized; in
  particular, ensure that ->neg is set to zero (fixes valgrind warning
  "Conditional jump ... depends on uninitialised value" in make_date_time)


sql-common/my_time.c:
  in number_to_datetime(), zero out the MYSQL_TIME structure
  before setting values, to ensure that all fields are initialized; in
  particular, ensure that ->neg is set to zero (fixes valgrind warning
  "Conditional jump ... depends on uninitialised value" in make_date_time)