add check on metrics validity in determinist too

include/evalhyd/determinist.hpp

@@ -36,6 +36,13 @@ namespace evalhyd
             const A& obs = q_obs.derived_cast();
             const A& sim = q_sim.derived_cast();
 
+            // check that the metrics to be computed are valid
+            utils::check_metrics(
+                    metrics,
+                    {"NSE"}
+            );
+
+            // instantiate determinist evaluator
             eh::determinist::Evaluator<A> evaluator(obs, sim);
 
             // declare maps for memoisation purposes