Log number of SpendDescriptions and note value if an invalid sapling spend happens

src/transaction_builder.cpp

@@ -182,7 +182,7 @@ boost::optional<CTransaction> TransactionBuilder::Build()
 
     auto ctx = librustzcash_sapling_proving_ctx_init();
 
-    LogPrintf("%s: Creating Sapling SpendDescriptions\n", __FUNCTION__);
+    LogPrintf("%s: Creating Sapling SpendDescriptions size=%d\n", __FUNCTION__, spends.size());
     // Create Sapling SpendDescriptions
     for (auto spend : spends) {
         auto cm = spend.note.cm();
@@ -213,7 +213,7 @@ boost::optional<CTransaction> TransactionBuilder::Build()
                 sdesc.rk.begin(),
                 sdesc.zkproof.data())) {
             librustzcash_sapling_proving_ctx_free(ctx);
-            LogPrintf("%s: Invalid sapling spend proof!\n", __FUNCTION__);
+            LogPrintf("%s: Invalid sapling spend proof! note value=%d\n", __FUNCTION__, spend.note.value() );
             return boost::none;
         }