The IM support patch from [1], imported into Mageia in [2] adds a
conditional sleep() call when the infinite loop runs into an empty
event queue which is bound to happen quite a few times.

This introduces pointless code and pointless wake ups as the used
XNextEvent function blocks on an empty queue anyway [3], thus
rendering the manual sleep() call superfluous.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=727822
[2] http://svnweb.mageia.org/soft?view=revision&revision=2011
[3] http://tronche.com/gui/x/xlib/event-handling/manipulating-event-queue/XNextEvent.html