Revert r26460 since it causes crashes on Windows, because the default assigment operator that does bit-to-bit copy is used instead of our specialized version, for some unknown reason... (#5043)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26462 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_mingw