Fix bug in call to 'adapt_grid

For the correct query of the boundary conditions, the time argument must
be 'time+dt', not the new time.

dune/dorie/interface/richards_simulation.cc

@@ -160,20 +160,20 @@ bool RichardsSimulation<Traits>::compute_time_step ()
 template<typename Traits>
 void RichardsSimulation<Traits>::run ()
 {
-	auto time = controller->getTime();
+	const auto time = controller->getTime();
+	const RF dt = controller->getDT();
 	write_data(time);
 
 	while(controller->doStep()) {
 		if(!compute_time_step()){
 			continue;
 		}
-		
-		time = controller->getTime();
-		write_data(time);
+
+		write_data(controller->getTime());
 
 		if(controller->doStep()
 		   && adaptivity->adapt_grid(*grid, gv, *gfs, *param, *fboundary,
-		                             time, *u))
+		                             time+dt, *u))
 		{
 			operator_setup(); // reset operators if grid changes
 		}