Fix for precompiled contracts.

libethereum/Precompiled.cpp

@@ -81,7 +81,8 @@ void ripemd160Code(bytesConstRef _in, bytesRef _out)
 
 void identityCode(bytesConstRef _in, bytesRef _out)
 {
-	_in.copyTo(_out);
+	bytes b = _in.toBytes();
+	memcpy(_out.data(), b.data(), min(_out.size(), b.size()));
 }
 
 }