HFA: expose color columns in RAT as Integer with values in range [0-255] instead of Real with values [0-1] (#5362, patch by Sam Gillingham)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26870 f0d54148-0727-0410-94bb-9a71ac55c965
HFA: report histogram column as GFU_PixelCount instead of GFU_Generic (#5359, patch by nflood)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26871 f0d54148-0727-0410-94bb-9a71ac55c965