Fix ccb4c37: Use of possibly uninitialised pointer (#7818)

src/aircraft_cmd.cpp

@@ -129,8 +129,8 @@ static StationID FindNearestHangar(const Aircraft *v)
 	uint max_range = v->acache.cached_max_range_sqr;
 
 	/* Determine destinations where it's coming from and where it's heading to */
-	const Station *last_dest;
-	const Station *next_dest;
+	const Station *last_dest = nullptr;
+	const Station *next_dest = nullptr;
 	if (max_range != 0) {
 		if (v->current_order.IsType(OT_GOTO_STATION) ||
 				(v->current_order.IsType(OT_GOTO_DEPOT) && v->current_order.GetDepotActionType() != ODATFB_NEAREST_DEPOT)) {
@@ -155,8 +155,8 @@ static StationID FindNearestHangar(const Aircraft *v)
 
 		/* Check if our last and next destinations can be reached from the depot airport. */
 		if (max_range != 0) {
-			uint last_dist = last_dest != nullptr && last_dest->airport.tile != INVALID_TILE ? DistanceSquare(st->airport.tile, last_dest->airport.tile) : 0;
-			uint next_dist = next_dest != nullptr && next_dest->airport.tile != INVALID_TILE ? DistanceSquare(st->airport.tile, next_dest->airport.tile) : 0;
+			uint last_dist = (last_dest != nullptr && last_dest->airport.tile != INVALID_TILE) ? DistanceSquare(st->airport.tile, last_dest->airport.tile) : 0;
+			uint next_dist = (next_dest != nullptr && next_dest->airport.tile != INVALID_TILE) ? DistanceSquare(st->airport.tile, next_dest->airport.tile) : 0;
 			if (last_dist > max_range || next_dist > max_range) continue;
 		}