Visibility of closed projects

Hello (again),

I've encountered the following problem with a user having "Project Leader" profile:
when checking the "projects" menu, even with the checkbox "show closed projects" enabled, the closed projects are not visible.
Using an profile with admin privileges, there is no issue.

Of course, I'm thinking this might be caused by some change made on the code within my organization, but I just wanted to make sure - is this behaviour correct for everyone else ? If it is, no need to worry about the following part of this message!

In case this is a problem for anyone else, here's my draft of a fix: