- avoid mingw problems with %l*
- avoid using %I32 on Win32, since wince doesn't support it
- unify WIN64 and WIN32 cases.
- if malloc were to fail(!), don't allow unfiltered format string
  to get passed to *printf.
  (substitues an error message)
Signed-off-by: David Flynn <davidf@rd.bbc.co.uk>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>