qt installwizard: fix empty filename crash
Traceback (most recent call last):
File "...\electrum\electrum\gui\qt\installwizard.py", line 256, in on_filename
widget_create_new.setVisible(temp_storage and temp_storage.file_exists())
TypeError: setVisible(self, bool): argument 1 has unexpected type 'NoneType'
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@@ -253,7 +253,7 @@ class InstallWizard(QDialog, MessageBoxMixin, BaseWizard):
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if msg is None:
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msg = _('Cannot read file')
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self.msg_label.setText(msg)
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widget_create_new.setVisible(temp_storage and temp_storage.file_exists())
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widget_create_new.setVisible(bool(temp_storage and temp_storage.file_exists()))
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if user_needs_to_enter_password:
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self.pw_label.show()
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self.pw_e.show()
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