Fix binary-string confusion in client network code

src/network/clientpackethandler.cpp

@@ -900,7 +900,7 @@ void Client::handleCommand_DetachedInventory(NetworkPacket* pkt)
 	u16 ignore;
 	*pkt >> ignore; // this used to be the length of the following string, ignore it
 
-	std::string contents = pkt->getRemainingString();
+	std::string contents(pkt->getRemainingString(), pkt->getRemainingBytes());
 	std::istringstream is(contents, std::ios::binary);
 	inv->deSerialize(is);
 }