Update time step immediately it is suggested. (A copy is still needed since...

Update time step immediately it is suggested. (A copy is still needed since the dynamically increased dt is updated later)
Signed-off-by: Santiago Ospina <santiago.ospina@iup.uni-heidelberg.de>

dune/dorie/solver/util_controller.hh

@@ -79,7 +79,9 @@ public:
 	/// suggest timestep
 	inline void suggest_timestep (R suggestion) {
 		use_dt_suggestion = true;
-		suggested_dt = suggestion;}
+		suggested_dt = suggestion;
+		dt = std::min(dt,suggested_dt);
+	}
 	/// Return current time
 	inline R getTime () const { return time; }
 	/// Return timestep for next calculation