groonga/groonga — pull request #195 by kou (2014-08-21 01:21:05+00:00)
Title: Make grn_obj_cast() for table with nonexistent key failure

The current behavior doesn't report any error and not set any value.
Users should check both return value of grn_obj_cast() and
GRN_BULK_VSIE(dest) is increased.

With this change, users only check return value of grn_obj_cast().