- 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.


SVN r1846 (trunk)

src/g_hexen/a_firedemon.cpp

@@ -145,7 +145,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FiredChase)
 
 	if(!self->target || !(self->target->flags&MF_SHOOTABLE))
 	{	// Invalid target
-		P_LookForPlayers (self,true);
+		P_LookForPlayers (self,true, NULL);
 		return;
 	}