[taler-exchange] 08/11: permit subtraction to result in zero

[gnunet]

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grothoff pushed a commit to branch master
in repository exchange.

commit b409d6a17e6aaf054876c7cc7fc08515d2315bbc
Author: Christian Grothoff <address@hidden>
AuthorDate: Sat Mar 28 21:39:34 2020 +0100

    permit subtraction to result in zero
---
 src/exchange/taler-exchange-aggregator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/exchange/taler-exchange-aggregator.c 
b/src/exchange/taler-exchange-aggregator.c
index 0ec3b16a..63a72c79 100644
--- a/src/exchange/taler-exchange-aggregator.c
+++ b/src/exchange/taler-exchange-aggregator.c
@@ -312,7 +312,7 @@ refund_by_coin_cb (void *cls,
               "Aggregator subtracts applicable refund of amount %s\n",
               TALER_amount2s (amount_with_fee));
   aux->have_refund = GNUNET_YES;
-  if (GNUNET_OK !=
+  if (GNUNET_SYSERR ==
       TALER_amount_subtract (&aux->total_amount,
                              &aux->total_amount,
                              amount_with_fee))

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