Fixed a regression causing libxdispatch not to be linked against libdispatch whenever a pre-installed libdispatch version is detected
Fixed a regression causing libxdispatch not to be linked against libdispatch whenever a pre-installed libdispatch version is detected

git-svn-id: ff420cdfd4b96e96fca1ec56388a20c3b5ac679c@576 9e4c620c-c391-4b63-a7fb-4924991ea895

mykeul/xdispatch,mykeul/xdispatch,mykeul/xdispatch,mykeul/xdispatch,mykeul/xdispatch