Fix #12092: Incorrect x-axis in cargo payment graph window

src/graph_gui.cpp

@@ -173,8 +173,8 @@ protected:
 	static const int GRAPH_ZERO_LINE_COLOUR =  GREY_SCALE(8);
 	static const int GRAPH_YEAR_LINE_COLOUR =  GREY_SCALE(5);
 	static const int GRAPH_NUM_MONTHS       =  24; ///< Number of months displayed in the graph.
-	static const int PAYMENT_GRAPH_X_STEP_DAYS    = 20; ///< X-axis step label for cargo payment rates "Days in transit".
-	static const int PAYMENT_GRAPH_X_STEP_SECONDS = 10; ///< X-axis step label for cargo payment rates "Seconds in transit".
+	static const int PAYMENT_GRAPH_X_STEP_DAYS    = 10; ///< X-axis step label for cargo payment rates "Days in transit".
+	static const int PAYMENT_GRAPH_X_STEP_SECONDS = 20; ///< X-axis step label for cargo payment rates "Seconds in transit".
 	static const int ECONOMY_QUARTER_MINUTES = 3;  ///< Minutes per economic quarter.
 
 	static const TextColour GRAPH_AXIS_LABEL_COLOUR = TC_BLACK; ///< colour of the graph axis label.