unused: use the vtkNotUsed macro

vtkUnused doesn't exist.

Change-Id: I416f09fe2ad000cef8926330dd925108d7c01315
Q4VTKWidgetPlugin: only define qDebug if not already defined

Change-Id: Icc064c384eedcc8056e3ac12859db53fbb8aa124
Merge topic 'dashboard-warnings-20140807' into master

69465e4b Q4VTKWidgetPlugin: only define qDebug if not already defined
f4eece1b unused: use the vtkNotUsed macro