idmap_rfc2307: Fix a crash after connection problem to DC
When the connection to the DC has a problem, the code behind
ads_do_search_retry closes the current connection and opens a new one.
The new connection has a new struct LDAP to represent the connection. In
this case, the LDAP pointer in the idmap_rfc2307_context becomes
invalid.
Fix this problem by updating the local pointer after calling
ads_do_search_retry.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>