wallet-core: fix withdrawal error reporting

packages/taler-wallet-core/src/operations/withdraw.ts

@@ -1615,6 +1615,19 @@ async function processWithdrawalGroupPendingReady(
 
   notifyTransition(ws, transactionId, res.transitionInfo);
 
+  if (numPlanchetErrors > 0) {
+    return {
+      type: OperationAttemptResultType.Error,
+      errorDetail: makeErrorDetail(
+        TalerErrorCode.WALLET_WITHDRAWAL_GROUP_INCOMPLETE,
+        {
+          errorsPerCoin,
+          numErrors: numPlanchetErrors,
+        },
+      ),
+    };
+  }
+
   return {
     type: OperationAttemptResultType.Finished,
     result: undefined,