* libtiff/tif_{unix,vms,win32}.c (_TIFFmalloc): ANSI C does not
require malloc() to return NULL pointer if requested allocation
size is zero.  Assure that _TIFFmalloc does.
_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
	return (0);
}

_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
	return (0);
}
