COMP: Undefine the min symbol for VC.

Visual Studio defines min as a macro and collides with the use of
std::min. Here we conditionally undefine the min macro.

Contributed by Luis Ibanez

From: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21591 3bd1e089-480b-0410-8dfb-8563597acbee