s3/passdb: clang: Fix 'Value stored during initialization is never read'

s3/passdb: clang: Fix 'Value stored during initialization is never read'

Fixes:

source3/passdb/pdb_ldap.c:1933:11: warning: Value stored to 'ret' during its initialization is never read <--[clang]
        NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
                 ^~~   ~~~~~~~~~~~~~~~~~~~~~~
source3/passdb/pdb_ldap.c:4094:11: warning: Value stored to 'ntstatus' during its initialization is never read <--[clang]
        NTSTATUS ntstatus = NT_STATUS_UNSUCCESSFUL;
                 ^~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Oct  8 02:40:24 UTC 2019 on sn-devel-184