[Tracker] some patches

[Carlos Garnacho <carlos imendio com>]

Hi!,

This was just a heads up to these three bugs:

#513692 : This one just packs booleans in guints, so it should improve
size in most used structs.
#513691 : a similar improvement to #511788 (already committed) in a
different function.
#513688 : rewrites a function so it doesn't need so much indentation,
logically it's the same.

These three patches look completely harmless, and I've tested them for
some days, is it ok to commit them?

Regards,
   Carlos