Author: Tim Hunt
MDL-27418 correct validation of numerical answers in qtype numeric.
This mostly affects locales that use , as decimal point.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=904894070151049e01a9f55fc1de9c4142d98c09
http://github.com/moodle/moodle/commit/904894070151049e01a9f55fc1de9c4142d98c09
+ 2.1 en [answermustbenumberorstar,qtype_numerical]