--- a/src/aircraft.h	Thu Apr 24 21:53:20 2008 +0000
+++ b/src/aircraft.h	Fri Apr 25 01:39:33 2008 +0000
@@ -54,6 +54,17 @@
 	}
 }
 
+/** Check if the aircraft is in flight between airports
+ * @param v vehicle to check
+ * @return Returns true if the aircraft is in flight
+ * false if it is any other state) */
+static inline bool IsInFlight(const Vehicle *v)
+{
+	assert(v->type == VEH_AIRCRAFT);
+	return ((v->u.air.pos == v->u.air.previous_pos) && v->u.air.state == FLYING);
+}
+
+
 /** Checks if an aircraft can use the station in question
  * @param engine The engine to test
  * @param st The station