Update to ZDoom r1848:

- Fixed: The deprecated flag handler for the old bounce flags needs to clear
  BOUNCE_MBF and BOUNCE_UseSeeSound, too, when clearing one of these flags.
- Fixed: When adding the AVOIDMELEE code the code was accidentally changed so that
  friendly monsters could no longer acquire targets by themselves.
- Renamed WIF_BOT_MELEE to WIF_MELEEWEAPON because it's no longer a bot only flag.
- Added MBF's monster_backing feature as an actor flag: AVOIDMELEE.
- Gez's misc. bugs patch:
* Moves the dog sound out of the Doom-specific sounds in SNDINFO to address this,
* Renames the dog actor to MBFHelperDog to prevent name conflicts,
* Adds APROP_Score to CheckActorProperty,
* Completes the randomspawner update (the reason I moved the recursion counter out of 
  special1 was that I found some projectiles had this set to them, for example in 
  A_LichAttack, but I forgot to add transfer for them),
* Provides centered sprites for beta plasma balls if this is deemed deserving correction.
- Added some pieces of MBF's friendly AI.
- Cleaned up A_LookEx code and merged most of it with the base functions.
  The major difference was a common piece of code that was repeated 5 times
  throughout the code so I moved it into a subfunction.
- Changed P_BlockmapSearch to pass a user parameter to its callback so that
  A_LookEx does not need to store its info inside the actor itself.
- fixed: The linetarget CCMD duplicated all of the info CCMD. 
- fixed: PrintActorInfo crashed due to some incomplete implementation.

git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@458 b0f79afe-0144-0410-b225-9a4edf0717df

src/svnrevision.h

@@ -3,5 +3,5 @@
 // This file was automatically generated by the
 // updaterevision tool. Do not edit by hand.
 
-#define ZD_SVN_REVISION_STRING "1837"
-#define ZD_SVN_REVISION_NUMBER 1837
+#define ZD_SVN_REVISION_STRING "1848"
+#define ZD_SVN_REVISION_NUMBER 1848