CRC: fix comment and fix build error from missing import

Signed-off-by: Jacinta Ferrant <[email protected]>

Author: jferrant

stackslib/src/chainstate/burn/operations/leader_block_commit.rs

@@ -313,11 +313,11 @@ impl LeaderBlockCommitOp {
         })?;
 
         // basic sanity checks
+        // if parent block ptr and parent vtxindex are both 0, then this block's parent is
+        // the genesis block.
         if data.parent_block_ptr == 0 && data.parent_vtxindex != 0 {
             warn!("Invalid tx: parent block back-pointer must be positive");
             return Err(op_error::ParseError);
-            // if parent block ptr and parent vtxindex are both 0, then this block's parent is
-            // the genesis block.
         }
 
         if u64::from(data.parent_block_ptr) >= block_height {

stackslib/src/chainstate/stacks/auth.rs

@@ -1414,7 +1414,7 @@ impl TransactionAuth {
             | TransactionAuth::Sponsored(
                 TransactionSpendingCondition::Singlesig(..),
                 TransactionSpendingCondition::OrderIndependentMultisig(..),
-            ) => epoch_id >= Epoch30,
+            ) => epoch_id >= StacksEpochId::Epoch30,
             TransactionAuth::Standard(TransactionSpendingCondition::Multisig(..))
             | TransactionAuth::Standard(TransactionSpendingCondition::Singlesig(..))
             | TransactionAuth::Sponsored(