revise cubic resampling kernel in line with wikipedia and Seth (#5209)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26492 f0d54148-0727-0410-94bb-9a71ac55c965
revised cubic resampling kernel in line with wikipedia and Seth (#5209)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26493 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage