WIN32: use tif_win32.c when building with CMake
see http://bugzilla.maptools.org/show_bug.cgi?id=2829
the top CMakeLists.txt defines win32_io and USE_WIN32_FILEIO
WIN32_IO is defined nowhere in CMake (only in automake things)
see http://bugzilla.maptools.org/show_bug.cgi?id=2829
the top CMakeLists.txt defines win32_io and USE_WIN32_FILEIO
WIN32_IO is defined nowhere in CMake (only in automake things)