(svn r4306) -Fix (103). Assertion when removing elrails under bridges. Thanks to Rubidium for reporting and fixing

elrail.c

@@ -91,11 +91,12 @@ static TrackBits GetRailTrackBitsUniversal(TileIndex t, byte *override)
 				return DiagDirToAxis(GetTunnelDirection(t)) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y;
 			} else {
 				if (GetRailType(t) != RAILTYPE_ELECTRIC) return 0;
-				if (
+				if (IsBridgeMiddle(t)) {
-					IsBridgeMiddle(t) &&
+					if (IsTransportUnderBridge(t) &&
-					IsTransportUnderBridge(t) &&
 						GetTransportTypeUnderBridge(t) == TRANSPORT_RAIL) {
 						return GetRailBitsUnderBridge(t);
+					} else
+						return 0;
 				} else {
 					if (override != NULL && DistanceMax(t, GetOtherBridgeEnd(t)) > 1) *override = 1 << GetBridgeRampDirection(t);