Fix regression with single stage exclusion

src/stv/mod.rs

@@ -972,7 +972,7 @@ where
 			for excluded_candidate in excluded_candidates.iter() {
 				let count_card = state.candidates.get_mut(excluded_candidate).unwrap();
 				votes.append(&mut count_card.parcels.concat());
-				//count_card.parcels.clear();
+				count_card.parcels.clear();
 				
 				// Update votes
 				let votes_transferred = votes.iter().fold(N::new(), |acc, v| acc + &v.value);