[Yt-svn] yt: Ooops, this is better logic for get_direct_parent()

[hg at spacepope.org]

hg Repository: yt
details:   yt/rev/0da17356ad02
changeset: 1953:0da17356ad02
user:      Stephen Skory <stephenskory at yahoo.com>
date:
Wed Aug 18 15:13:03 2010 -0700
description:
Ooops, this is better logic for get_direct_parent()

diffstat:

 yt/extensions/merger_tree.py |  2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diffs (12 lines):

diff -r 3821efd7b49c -r 0da17356ad02 yt/extensions/merger_tree.py
--- a/yt/extensions/merger_tree.py	Wed Aug 18 15:06:06 2010 -0700
+++ b/yt/extensions/merger_tree.py	Wed Aug 18 15:13:03 2010 -0700
@@ -838,7 +838,7 @@
         """
         parents = self.get_halo_parents(GlobalHaloID)
         mass = 0
-        ID = -1
+        ID = None
         for parent in parents:
             if parent[1] < 0.5: continue
             info = self.get_halo_info(parent[0])