From bef9fdc471e613ef4810ad1305c226334218fedd Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Thu, 19 Feb 2009 15:46:57 -0400
Subject: [PATCH] If an account's aggregate amount is null, return 0

---
 src/account.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/account.cc b/src/account.cc
index 07c01c7e..741cc2f9 100644
--- a/src/account.cc
+++ b/src/account.cc
@@ -187,7 +187,10 @@ namespace {
 
   value_t get_amount(account_t& account) {
     assert(account.xdata_);
-    return account.xdata_->value;
+    if (account.xdata_->value.is_null())
+      return 0L;
+    else
+      return account.xdata_->value;
   }
 
   value_t get_depth(account_t& account) {