Field_time::get_date method does not initialize MYSQL_TIME::time_type field.
The fix is to init this field.


mysql-test/r/type_time.result:
  test case
mysql-test/t/type_time.test:
  test case
sql/field.cc:
  --use Field_time::get_time in Field_time::get_date
  --removed duplicated code in Field_time::get_date method