STYLE: avoid warning a about narrowing 0.0 to int

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22247 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: #1930 ensure redraw after rotate to volume plane

Make sure matrices reflect current orientation of the slice
plane.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22248 3bd1e089-480b-0410-8dfb-8563597acbee