The Field_newdate::store when storing a DATETIME value was returning the
'value was cut' error even if the thd->count_cuted_fields flag is set to
CHECK_FIELD_IGNORE. This made range optimizr think that there is no
appropriate data in the table and thus to return an empty set.

Now the Field_newdate::store function returns conversion error only if the
thd->count_cuted_fields flag isn't set to CHECK_FIELD_IGNORE.


mysql-test/t/type_time.test:
  Added a test case for the bug#29729: Wrong conversion error led to an empty result set.
mysql-test/r/type_time.result:
  Added a test case for the bug#29729: Wrong conversion error led to an empty result set.
sql/field.cc:
  Bug#29729: Wrong conversion error led to an empty result set.