Bug#917129: slapd-smbk5pwd: crashes when enabling krb5

[Ryan Tandy]

I proposed a merge request on salsa for this issue.

https://salsa.debian.org/debian/cyrus-sasl2/merge_requests/2
as a git-format-patch(1) patch:

https://salsa.debian.org/debian/cyrus-sasl2/merge_requests/2.patch

See the original message on the bug for how to test the issue. With the 
package in current unstable/testing, slapd crashes when initializing the 
smbk5pwd overlay. With this patch, slapd no longer crashes and the 
module is usable.