Safari build fails in Xcode Version 4.3.2

[jaxcore]

The build fails, this is the first error:

openni_backend.cpp
Lexical or Preprocessor Issue
'XnOpenNi.h' file not found

I cannot find XnOpenNi.h anywhere on my system. I have the prerequisites installed and the OpenNI samples work, so I know the Kinect driver works.

Also, will it be possible to provide this as a pre-compiled Safari/Chrome extension? Xcode is a nightmare for those of us that don't use it regularly. If I can't figure out how to compile this, I can't imagine how end-users will ever be able to.