Add a TODO comment for a missing no-coinbase check

zebra-consensus/src/transaction.rs

@@ -152,10 +152,10 @@ where
 
                     // Handle transparent inputs and outputs.
                     if tx.is_coinbase() {
-                        // do something special for coinbase transactions
                         check::coinbase_tx_no_joinsplit_or_spend(&tx)?;
                     } else {
-                        // otherwise, check no coinbase inputs
+                        // TODO: check no coinbase inputs
+                        
                         // feed all of the inputs to the script verifier
                         let cached_ffi_transaction =
                             Arc::new(CachedFfiTransaction::new(tx.clone()));