ofVideoGrabber with no camera connected

is there a way of checking if a camera is connected before using initGrabber? if I have no camera connected my program segfaults and I can’t catch the exception

initGrabber should return a bool for this.
check: http://ofxfenster.undef.ch/doc/classofVideoGrabber.html#a6ddad29192b99cad254f20f01a2b8bc1