Use XIDefineCursor rather than XDefineCursor.

compiz should show a busy cursor during the application startup stage.
the corresponding code is in scr/screen.cpp:
cps::StartupSequenceImpl::updateStateFeedback ()
the patch changes all XDefineCursor to XIDefineCursor (see XInput2 extension)

(LP: #1179155). Fixes: https://bugs.launchpad.net/bugs/1179155.

Approved by PS Jenkins bot, Sam Spilsbury.