Add missing method from new base class.  Fixes #3206
Fix typo and compilation bug.
Merge pull request #3207 from bakercp/bugfix-basevideo-win

Bugfix basevideo win
Merge branch 'master' of github.com:openframeworks/openFrameworks into const-correct

Conflicts:
	libs/openFrameworks/video/ofDirectShowGrabber.h
	libs/openFrameworks/video/ofQuickTimeGrabber.cpp