Update to ZDoom r1600:

- Fixed: When setting up a deep water sector with Transfer_Heights the floorclip
  information of all actors in the sector needs to be updated.
- Fixed: A_CountdownArg and A_Die must ensure a certain kill.
- Fixed: When using Win32 mouse, windowed mode, alt-tabbing away and then
  clicking on the window's title bar moved it practically off the screen.
- Beginnings of i_input.cpp rewrite: Win32 and DirectInput mouse handling has
  been moved into classes.
- Changed bounce flags into a property and added real bouncing sound properties.
  Compatibility modes to preserve use of the SeeSound are present and the old
  flags map to these.
- Fixed: The SBARINFO parser compared an FString in the GAMEINFO with a NULL
  pointer and tried to load a lump with an empty name as statusbar script
  for non-Doom games.
- Fixed: SetSoundPaused() still needs to call S_PauseSound() to pause music
  that isn't piped through the digital sound system. (Was removed in r1004.)
- Added input buffering to the Implode and Shrink routines for a marked
  speedup.
- Replaced the Shanno-Fano/Huffman reading routines from FZipExploder with
  ones of my own devising, based solely on the specs in the APPNOTE.
- Found a copy of PKZIP 1.1 and verified that Implode support works with
  files that use a literal table and 8k dictionary, and that the just-added
  Shrink support works at all.
- Replaced the bit-at-a-time Shannon-Fano decoder from GunZip.c64 with the
  word-at-a-time one from 7-Zip for a slight speedup when working with
  Imploded files.
- Fixed: Monsters should not check the inventory for damage absorbtion when
  they have the MF5_NODAMAGE flag set.
- Added patch for saving automap zoom.

git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@328 b0f79afe-0144-0410-b225-9a4edf0717df

src/r_bsp.cpp

@@ -352,9 +352,9 @@ sector_t *R_FakeFlat(sector_t *sec, sector_t *tempsec,
 
 	FakeSide = FAKED_Center;
 
-	if (sec->heightsec && !(sec->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC))
+	const sector_t *s = sec->GetHeightSec();
+	if (s != NULL)
 	{
-		const sector_t *s = sec->heightsec;
 		sector_t *heightsec = viewsector->heightsec;
 		bool underwater = r_fakingunderwater ||
 			(heightsec && viewz <= heightsec->floorplane.ZatPoint (viewx, viewy));