Author: Tim Hunt
MDL-32188 question CBM: minimal handling of certainty -1
Certainty -1 has never been used in standard Moodle, but is
used in Tony-Gardiner Medwin's patches to mean 'No idea' which
we intend to implement: MDL-42077. In the mean time, these changes
avoid errors for people who have used TGM's patches.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2bf83cb218e19a80ce0d33893b9fdcddf5192487
http://github.com/moodle/moodle/commit/2bf83cb218e19a80ce0d33893b9fdcddf5192487
+ 2.6 en [certainty-1,qbehaviour_deferredcbm]
+ 2.6 en [certaintyshort-1,qbehaviour_deferredcbm]