sieve-extdata plugin breaks on pigeonhole 0.5 ish

Hi, I wonder if someone could give me a little help bringing the sieve-extdata plugin up to date to be usable with latest Dovecot/pigeonhole

Trying to use both together at present I get an error:

  managesieve: Fatal: Couldn't load required plugin /usr/lib/dovecot/sieve/lib90_sieve_extdata_plugin.so: dlopen() failed: /usr/lib/dovecot/sieve/lib90_sieve_extdata_plugin.so: undefined symbol: sieve_sys_error

This appears to be due to the change in error handling in pigeonhole 0.5 which appears to have removes the "sieve_sys_error()" and "sieve_sys_warning()" functions

I'm unclear how this code should be change (I've commented it out for now - eek).

I find this extension useful to pass in user specific parameters to my sieve scripts that are stored elsewhere in an sql database, eg spam score, size threshold for attachments, perhaps there is some other way to achieve this?

Any hints on how to fixing this would be appreciated

Thanks

Ed W