vchoi_fork

[svn-r12703] Using int64_t in H5Lpublic.h caused errors on Windows, where int64_t is only
defined in H5private.h.

Moved definition of int64_t from H5private.h to H5public.h as a temporary
solution.

Tested on heping and Windows (windows also needed H5Gdense.c and H5Gbtree2.c
to be added to hdf5 project).