WINTERMUTE: Remove reference to filledPixels outside #if CONSISTENCY_CHECK
WINTERMUTE: Make _debugColor static const
WINTERMUTE: Print rect count in bailout message
WINTERMUTE: Move kMaxQueueLen check inside inner loop so as to save a few more cycles
WINTERMUTE: Print rect count for debug puropuses
WINTERMUTE: A couple asserts in DirtyRectContainer