- Used the one unused byte in the state structure as a flag to tell what type

the NextState parameter is. The code did some rather unsafe checks with it
  to determine its type.
- moved all state related code into a new file: p_states.cpp.
- merged all FindState functions. All the different variations are now inlined
  and call the same function to do the real work.


SVN r1243 (trunk)

src/thingdef/thingdef_properties.cpp

@@ -573,8 +573,7 @@ DEFINE_PROPERTY(skip_super, 0, Actor)
 	{
 		FreeDropItemChain (bag.DropItemList);
 	}
-	ResetBaggage (&bag);
-	MakeStateDefines(NULL);
+	ResetBaggage (&bag, RUNTIME_CLASS(AActor));
 }
 
 //==========================================================================