Always use stat rather than stat64 for Mac OSX in AC_UNIX_STDIO_64.  Apple deprecated stat64 in Mac OSX >= 10.6.  size_t is always 8 bytes in both 32 and 64-bit compiles with struct stat starting in Mac OSX 10.5 (#5780, #5414).


git-svn-id: https://svn.osgeo.org/gdal/trunk@28182 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx