Minor tweaks

ethcore/src/miner/transaction_queue.rs

@@ -984,7 +984,7 @@ impl TransactionQueue {
 		let mut delayed = HashSet::new();
 		for t in self.current.by_priority.iter() {
 			let tx = self.by_hash.get(&t.hash).expect("All transactions in `current` and `future` are always included in `by_hash`");
-			let sender = tx.transaction.sender().expect("Queue only contains transactions with valid sender");
+			let sender = tx.sender();
 			if delayed.contains(&sender) {
 				continue;
 			}

ethcore/src/types/transaction.rs

@@ -390,7 +390,7 @@ impl Deref for LocalizedTransaction {
 	}
 }
 
-/// Queued information with additional information.
+/// Queued transaction with additional information.
 #[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct PendingTransaction {
 	/// Signed transaction data.