code/satoshi-words: save_script, use const.

code/satoshi-words.cpp

@@ -7,7 +7,7 @@
 int main()
 {
     // Create genesis block.
-    bc::block_type block = bc::genesis_block();
+    const bc::block_type block = bc::genesis_block();
     // Genesis block contains a single coinbase transaction.
     assert(block.transactions.size() == 1);
     // Get first transaction in block (coinbase).
@@ -16,7 +16,7 @@ int main()
     assert(coinbase_tx.inputs.size() == 1);
     const bc::transaction_input_type& coinbase_input = coinbase_tx.inputs[0];
     // Convert the input script to its raw format.
-    const bc::data_chunk& raw_message = save_script(coinbase_input.script);
+    const bc::data_chunk raw_message = save_script(coinbase_input.script);
     // Convert this to an std::string.
     std::string message;
     message.resize(raw_message.size());
@@ -25,4 +25,3 @@ int main()
     std::cout << message << std::endl;
     return 0;
 }
-