simplewallet: don't confirm missing payment ID when sending to only subaddresses

src/simplewallet/simplewallet.cpp

@@ -4362,6 +4362,7 @@ bool simple_wallet::transfer_main(int transfer_type, const std::vector<std::stri
   }
 
   vector<cryptonote::tx_destination_entry> dsts;
+  size_t num_subaddresses = 0;
   for (size_t i = 0; i < local_args.size(); i += 2)
   {
     cryptonote::address_parse_info info;
@@ -4373,6 +4374,7 @@ bool simple_wallet::transfer_main(int transfer_type, const std::vector<std::stri
     }
     de.addr = info.address;
     de.is_subaddress = info.is_subaddress;
+    num_subaddresses += info.is_subaddress;
 
     if (info.has_payment_id)
     {
@@ -4405,7 +4407,7 @@ bool simple_wallet::transfer_main(int transfer_type, const std::vector<std::stri
   }
 
   // prompt is there is no payment id and confirmation is required
-  if (!payment_id_seen && m_wallet->confirm_missing_payment_id())
+  if (!payment_id_seen && m_wallet->confirm_missing_payment_id() && dsts.size() > num_subaddresses)
   {
      std::string accepted = input_line(tr("No payment id is included with this transaction. Is this okay?  (Y/Yes/N/No): "));
      if (std::cin.eof())
@@ -4823,7 +4825,7 @@ bool simple_wallet::sweep_main(uint64_t below, const std::vector<std::string> &a
   }
 
   // prompt is there is no payment id and confirmation is required
-  if (!payment_id_seen && m_wallet->confirm_missing_payment_id())
+  if (!payment_id_seen && m_wallet->confirm_missing_payment_id() && !info.is_subaddress)
   {
      std::string accepted = input_line(tr("No payment id is included with this transaction. Is this okay?  (Y/Yes/N/No): "));
      if (std::cin.eof())
@@ -5022,7 +5024,7 @@ bool simple_wallet::sweep_single(const std::vector<std::string> &args_)
   }
 
   // prompt if there is no payment id and confirmation is required
-  if (!payment_id_seen && m_wallet->confirm_missing_payment_id())
+  if (!payment_id_seen && m_wallet->confirm_missing_payment_id() && !info.is_subaddress)
   {
      std::string accepted = input_line(tr("No payment id is included with this transaction. Is this okay?  (Y/Yes/N/No): "));
      if (std::cin.eof())