Code review comment for lp:~ted/indicator-sync/upstart-no-greeter

This is a little hacky, but I agree it's solving the problem.

To test, I locked the screen & went to the greeter and waited for 60 seconds. During that time, /var/lib/lightdm/.cache/upstart/indicator-sync.log grew by 264 lines.

In a second equivalent test, it grew by 235 lines.

In another equivalent test *after* applying this patch, it grew by 4 lines.