wallet: Include coinbase txs in Sapling note selection

src/wallet/wallet.cpp

@@ -4885,12 +4885,16 @@ void CWallet::GetFilteredNotes(
 
         // Filter the transactions before checking for notes
         if (!CheckFinalTx(wtx) ||
-            wtx.GetBlocksToMaturity() > 0 ||
             wtx.GetDepthInMainChain() < minDepth ||
             wtx.GetDepthInMainChain() > maxDepth) {
             continue;
         }
 
+        // Filter coinbase transactions that don't have Sapling outputs
+        if (wtx.IsCoinBase() && wtx.mapSaplingNoteData.empty()) {
+            continue;
+        }
+
         for (auto & pair : wtx.mapSproutNoteData) {
             JSOutPoint jsop = pair.first;
             SproutNoteData nd = pair.second;