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@@ -60,6 +60,8 @@ def prepare_choice(widget, holder, propname, choice, default,
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oldvalue = qubesadmin.DEFAULT
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oldvalue = qubesadmin.DEFAULT
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else:
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else:
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oldvalue = getattr(holder, propname)
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oldvalue = getattr(holder, propname)
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+ if oldvalue == '':
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+ oldvalue = None
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if transform is not None and oldvalue is not None:
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if transform is not None and oldvalue is not None:
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oldvalue = transform(oldvalue)
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oldvalue = transform(oldvalue)
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else:
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else:
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