Fix warnings.

libdevcrypto/CryptoPP.cpp

@@ -199,6 +199,8 @@ bool Secp256k1::verifySecret(Secret const& _s, Public& _p)
 
 void Secp256k1::agree(Secret const& _s, Public const& _r, h256& o_s)
 {
+	(void)o_s;
+	(void)_s;
 	ECDH<ECP>::Domain d(m_oid);
 	assert(d.AgreedValueLength() == sizeof(o_s));
 	byte remote[65] = {0x04};

libethereum/State.h

@@ -147,12 +147,12 @@ public:
 	/// Like sync but only operate on _tq, killing the invalid/old ones.
 	bool cull(TransactionQueue& _tq) const;
 
-    LastHashes getLastHashes(BlockChain const& _bc, unsigned _n) const;
+	LastHashes getLastHashes(BlockChain const& _bc, unsigned _n) const;
 
 	/// Execute a given transaction.
 	/// This will append @a _t to the transaction list and change the state accordingly.
-    u256 execute(BlockChain const& _bc, bytes const& _rlp, bytes* o_output = nullptr, bool _commit = true);
+	u256 execute(BlockChain const& _bc, bytes const& _rlp, bytes* o_output = nullptr, bool _commit = true);
-    u256 execute(BlockChain const& _bc, bytesConstRef _rlp, bytes* o_output = nullptr, bool _commit = true);
+	u256 execute(BlockChain const& _bc, bytesConstRef _rlp, bytes* o_output = nullptr, bool _commit = true);
 	u256 execute(LastHashes const& _lh, bytes const& _rlp, bytes* o_output = nullptr, bool _commit = true) { return execute(_lh, &_rlp, o_output, _commit); }
 	u256 execute(LastHashes const& _lh, bytesConstRef _rlp, bytes* o_output = nullptr, bool _commit = true);