Add xdata2 field to OrderExtraInfo

src/order_base.h

@@ -75,6 +75,7 @@ void ClearOrderDestinationRefcountMap();
 struct OrderExtraInfo {
 	uint8 cargo_type_flags[NUM_CARGO] = {}; ///< Load/unload types for each cargo type.
 	uint32 xdata = 0;                       ///< Extra arbitrary data
+	uint32 xdata2 = 0;                      ///< Extra arbitrary data
 	uint16 dispatch_index = 0;              ///< Scheduled dispatch index + 1
 	uint8 xflags = 0;                       ///< Extra flags
 	uint8 colour = 0;                       ///< Order colour + 1
@@ -150,6 +151,17 @@ public:
 		return this->extra->xdata;
 	}
 
+	inline uint32 GetXData2() const
+	{
+		return this->extra != nullptr ? this->extra->xdata2 : 0;
+	}
+
+	inline uint32 &GetXData2Ref()
+	{
+		CheckExtraInfoAlloced();
+		return this->extra->xdata2;
+	}
+
 	Order *next;          ///< Pointer to next order. If nullptr, end of list
 
 	Order() : flags(0), refit_cargo(CT_NO_REFIT), max_speed(UINT16_MAX) {}