tests/test-issue1438.t

parser: use PyInt_FromSsize_t in index_stats

Eliminates

  mercurial/parsers.c(515) : warning C4244: 'function' : conversion from
  'Py_ssize_t' to 'long', possible loss of data
  mercurial/parsers.c(520) : warning C4244: 'function' : conversion from
  'Py_ssize_t' to 'long', possible loss of data
  mercurial/parsers.c(521) : warning C4244: 'function' : conversion from
  'Py_ssize_t' to 'long', possible loss of data

when compiling for Windows x64 target using the Microsoft compiler.

PyInt_FromSsize_t does not exist for Python 2.4 and earlier, so we define a
fallback in util.h to use PyInt_FromLong when compiling for Python 2.4.

http://mercurial.selenic.com/bts/issue1438

  $ "$TESTDIR/hghave" symlink || exit 80

  $ hg init

  $ ln -s foo link
  $ hg add link
  $ hg ci -mbad link
  $ hg rm link
  $ hg ci -mok
  $ hg diff -g -r 0:1 > bad.patch

  $ hg up 0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg import --no-commit bad.patch
  applying bad.patch

  $ hg status
  R link
  ? bad.patch