Payment dialog - always list all possible post accounts

Before only the post account in the currency of the selected
vendor or customer was available.

This was reported in bug 797487n comment 17.

gnucash/gnome/dialog-payment.c

@@ -215,7 +215,7 @@ gnc_payment_window_refresh_handler (G_GNUC_UNUSED GHashTable *changes, gpointer
     PaymentWindow *pw = data;
 
     gnc_payment_window_fill_docs_list (pw);
-    pw->post_acct = gnc_account_select_combo_fill (pw->post_combo, pw->book, pw->acct_types, pw->acct_commodities);
+    pw->post_acct = gnc_account_select_combo_fill (pw->post_combo, pw->book, pw->acct_types, NULL);
 }
 
 static gboolean
@@ -629,7 +629,7 @@ gnc_payment_dialog_owner_changed (PaymentWindow *pw)
     if (gncOwnerIsValid(owner))
         pw->acct_commodities = gncOwnerGetCommoditiesList (owner);
 
-    pw->post_acct = gnc_account_select_combo_fill (pw->post_combo, pw->book, pw->acct_types, pw->acct_commodities);
+    pw->post_acct = gnc_account_select_combo_fill (pw->post_combo, pw->book, pw->acct_types, NULL);
     if (gncOwnerEqual(&pw->owner, &pw->tx_info->owner) && pw->tx_info->post_acct)
     {
         pw->post_acct = pw->tx_info->post_acct;