Lesson: allow linking to pages inside a lesson

I'm not sure if this is a bug report or an improvement request

A client of ours has a Moodle in which they use lessons extensively. They created a sort of table-of-contents from hand, with links to various pages inside of each lesson. http://docs.moodle.org/en/Lesson#Other_unusual_ways_to_link suggests that this should be possible.

Anyway, they ran into the problem that if you try to link to a page within a lesson, and you haven't previously started this lesson in the traditional way (e.g. by clicking on the link to the lesson activity itself), you get the error message "Error: could not find records".

For example, there's a link to a page within a lesson:
.../mod/lesson/view.php?id=154&pageid=329
But, unless you've already visited .../mod/lesson/view.php?id=154 <-- no pageid parameter, you'll get the error.

This is because in view.php it looks for a record in the lesson_timer table (also for untimed lessons) when there is a pageid parameter, but it only creates an entry in the lesson_timer table when there is no pageid parameter.

Attached are two small patch files that provide a fix.