Merge #896: Fix autofreeze warning on Qt

4599bd75a8 Fix autofreeze warning on Qt (Adam Gibson)

Pull request description:

  The autofreeze utxo callback takes a `utxo` as argument, not a utxo string, so convert here in `joinmarket-qt.py`, just as in `WalletService.default_autofreeze_callback`.

ACKs for top commit:
  kristapsk:
    ACK 4599bd75a8, tested before / after, merging.

Tree-SHA512: ddb13cc98bd6a116636a8e863f93696537402be71de17e169152537425b28cdb062288b442489e03f02fbcd76134269b33e49495078fff7c206f9c12543b91c2

scripts/joinmarket-qt.py

@@ -1854,12 +1854,14 @@ class JMMainWindow(QMainWindow):
             mn_extension = pp_field.text()
         return message_e.toPlainText(), mn_extension
 
-    def autofreeze_warning_cb(self, utxostr):
+    def autofreeze_warning_cb(self, utxo):
         """ Handles coins sent to reused addresses,
         preventing forced address reuse, according to value of
         POLICY setting `max_sats_freeze_reuse` (see
         WalletService.check_for_reuse()).
         """
+        success, utxostr = utxo_to_utxostr(utxo)
+        assert success, "Autofreeze warning cb called with invalid utxo."
         msg = "New utxo has been automatically " +\
              "frozen to prevent forced address reuse:\n" + utxostr +\
              "\n You can unfreeze this utxo via the Coins tab."