- 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_dragon.cpp

@@ -213,7 +213,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_DragonFlight)
 	}
 	else
 	{
-		P_LookForPlayers (self, true);
+		P_LookForPlayers (self, true, NULL);
 	}
 }