Merge branch 'save_ext' into jgrpp

Conflicts:
	src/pathfinder/follow_track.hpp

src/pathfinder/follow_track.hpp

@@ -145,7 +145,12 @@ struct CFollowTrackT
 			 * missing road bit, or inability to connect the
 			 * different bits due to slopes. */
 			if (IsRoadTT() && !IsTram() && TryReverse()) return true;
+
+			/* CanEnterNewTile already set a reason.
+			 * Do NOT overwrite it (important for example for EC_RAIL_TYPE).
+			 * Only set a reason if CanEnterNewTile was not called */
 			if (m_new_td_bits == TRACKDIR_BIT_NONE) m_err = EC_NO_WAY;
+
 			return false;
 		}
 		if (!Allow90degTurns()) {