[Stellarium-pubdevel] Fix memory mapping crash on Windows patch

[Mike S. <oop...@gm...>]

Hi all,

Barry Gerdes reported in this forum post:
https://sourceforge.net/forum/forum.php?thread_id=2622985&forum_id=278769
that several Windows boxes of his crashed when zooming in on stars
that were memory mapped using the new QFile::map() method. I haven't
figured out why this happens yet, but I've attached a patch that
causes Windows builds to use the old mmap() function. Linux and Mac
still use the new QFile::map() method. I finally got Stellarium to
build on my Windows dual-boot, so it's tested on XP SP3 and Linux.

Fabien, you said in the original thread for the ZoneArray patch that
you tested a Windows build, and it worked. Do you know what the system
specs on that machine were? And did you zoom in on the large memory
mapped catalogs? Apparently, it only crashes when you do that.

Mike