- some reshuffling of save data so that the actors won't get restored before the sectors.

Note that this required splitting P_SerializeWorld, because sector_t and FSectorPortal contain some actor pointers, for which the same rule applies: Portal linking can only be done after all sectors have been read, meaning it cannot be done along with the rest of the data in these structures.

Obviously such a change breaks savegame compatibility so the min. savegame version had to be increased again.

src/portal.cpp

@@ -230,8 +230,7 @@ FArchive &operator<< (FArchive &arc, FSectorPortal &port)
 		<< port.mOrigin
 		<< port.mDestination
 		<< port.mDisplacement
-		<< port.mPlaneZ
-		<< port.mSkybox;
+		<< port.mPlaneZ;
 	return arc;
 }