Code review comment for lp://staging/~brandontschaefer/unity/move-pointer-barrier-to-xi-1.6.99.1

trying to build with the old libxfixes it fails on:

"/usr/include/X11/extensions/XInput2.h:173:22: error: conflicting declaration ‘typedef unsigned int BarrierEventID’
  typedef unsigned int BarrierEventID;

the requirement/build-depends on that one should probably be bumped as well

works fine otherwise ;-)