Add another NMAKE version from Visual Studio 2012

git-svn-id: http://svn.osgeo.org/geos/trunk@3824 5242fede-7e19-0410-aef8-94bd7d2200fb
Fix typo in HotPixel corners initializer

Patch by Mickael BORNE <mickael.borne@ign.fr>

git-svn-id: http://svn.osgeo.org/geos/trunk@3826 5242fede-7e19-0410-aef8-94bd7d2200fb