#if out unused MinFunction (#5414)

git-svn-id: https://svn.osgeo.org/gdal/branches/1.11@27706 f0d54148-0727-0410-94bb-9a71ac55c965
fix DEBUG if for UnpackCmplx, remove extra parens, comment out unsigned tautologies (#5414)

git-svn-id: https://svn.osgeo.org/gdal/branches/1.11@27707 f0d54148-0727-0410-94bb-9a71ac55c965