CinderFreenect: remove stray semicolon to silence compiler warning

warning was: "/Users/liam/code/github/cinder_0.8.5_mac/blocks/Cinder-Kinect/src/CinderFreenect.cpp:237:45: warning: if statement has empty body [-Wempty-body]
                if( freenect_init( &sContext, NULL ) < 0 );
                                                          ^
/Users/liam/code/github/cinder_0.8.5_mac/blocks/Cinder-Kinect/src/CinderFreenect.cpp:237:45: note: put the semicolon on a separate line to silence this warning"
CinderFreenect: ensure initializers match declaration order to avoid build warnings.

no functional changes.
freenect: comment out unused static function to avoid build warning
Merge pull request #5 from liamstask/fix-build-warnings

Fix build warnings