ext/ldap: Fix GH-16032 (Various NULL pointer dereferencements in ldap_modify_batch())

We check that the "attrib" and "modtype" keys are present in each array.
If not we throw a ValueErro

ext/ldap: Fix GH-16032 (Various NULL pointer dereferencements in ldap_modify_batch())

We check that the "attrib" and "modtype" keys are present in each array.
If not we throw a ValueError, in line with what other validation failure cases do.

Closes GH-16057

show more ...