tfix #4497 - electrum - Electrum Bitcoin wallet
 (HTM) git clone https://git.parazyd.org/electrum
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       ---
 (DIR) commit f7c8e5a33b114bd8eebbfa575d819042f6dce747
 (DIR) parent 92e510f8aa31ebf75a3b55fae28c62db8cef6d19
 (HTM) Author: SomberNight <somber.night@protonmail.com>
       Date:   Wed,  4 Jul 2018 16:04:04 +0200
       
       fix #4497
       
       Diffstat:
         M gui/kivy/main_window.py             |       3 +++
         M gui/kivy/uix/screens.py             |       8 +++++++-
       
       2 files changed, 10 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/gui/kivy/main_window.py b/gui/kivy/main_window.py
       t@@ -288,6 +288,9 @@ class ElectrumWindow(App):
                return os.path.basename(self.wallet.storage.path) if self.wallet else ' '
        
            def on_pr(self, pr):
       +        if not self.wallet:
       +            self.show_error(_('No wallet loaded.'))
       +            return
                if pr.verify(self.wallet.contacts):
                    key = self.wallet.invoices.add(pr)
                    if self.invoices_screen:
 (DIR) diff --git a/gui/kivy/uix/screens.py b/gui/kivy/uix/screens.py
       t@@ -166,8 +166,12 @@ class SendScreen(CScreen):
        
            kvname = 'send'
            payment_request = None
       +    payment_request_queued = None
        
            def set_URI(self, text):
       +        if not self.app.wallet:
       +            self.payment_request_queued = text
       +            return
                import electrum
                try:
                    uri = electrum.util.parse_URI(text, self.app.on_pr)
       t@@ -182,7 +186,9 @@ class SendScreen(CScreen):
                self.screen.is_pr = False
        
            def update(self):
       -        pass
       +        if self.app.wallet and self.payment_request_queued:
       +            self.set_URI(self.payment_request_queued)
       +            self.payment_request_queued = None
        
            def do_clear(self):
                self.screen.amount = ''