Missing qdoc/qtalgorithms-members.html

Debian bug: <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=650828>

As stated in the above bug:

Go "Contents" -> "Qt Reference Documentation"
-> "Classes" -> "<QtAlgorithms>"
-> "List of all members" and then I got something like:
The page could not be found
qthelp://com.trolltech.qt.472/qdoc/qtalgorithms-members.html'

Of course I reviewed our build process and everything seems in place.
Looking at a build log like [0] this html doc seems not to be generated at all.

I don't discard it can be an issue on our side, but if so I wasn't able to detect where it comes from.

[0] <https://buildd.debian.org/status/fetch.php?pkg=qt4-x11&arch=i386&ver=4%3A4.8.4%2Bdfsg-4&stamp=1369417728>