electrum

commit f3440f5a20bee6c64f738ffc32010e94ad8c6dab
parent 99710099fb3566b2c4c1a976e8cf79d431ad56db
Author: ThomasV <thomasv@electrum.org>
Date:   Wed, 21 Feb 2018 21:09:07 +0100

fix 3954

Diffstat:
M
lib/wallet.py
 | 
3
++-

1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/wallet.py b/lib/wallet.py
@@ -1039,7 +1039,8 @@ class Abstract_Wallet(PrintError):
             out.append(item)
         # add summary
         if out:
-            start_balance = out[0]['balance'].value - out[0]['value'].value
+            b, v = out[0]['balance'].value, out[0]['value'].value
+            start_balance = None if b is None or v is None else b - v
             end_balance = out[-1]['balance'].value
             if from_timestamp is not None and to_timestamp is not None:
                 start_date = timestamp_to_datetime(from_timestamp)