the ticket is already closed.
No it is not, it is only "resolved", i.e. the developer solved the issue either by fixing it himself, by apply a patch, or by discarding it. Now it's your turn as reporter to "close" the issue, i.e. you do the final test and verify that the issue really is solved. A "closed" issue is removed from most of the bugtracker lists which helps the developers by thinning out the bug lists. If you don't agree that the issue is solved you can re-open it by clicking on the "Reopen" button (this can happen even after you "closed" the ticket and discover later that the issue still exists under some circumstances.)
BTW, I would not close this particular issue because it does not consider the argument brought in by sstvmaster (reply #10): The unzipper should check the available disk space *before* beginning to write to disk. The current solution allows to write gigabytes to the HD and notice only at the end that the disk is overrunning. I think Michael was not aware of this aspect when resolving the issue. At least it should be brought to his attention to make him reconsider his solution.