Let's be explicit with asserts; there was a bug in histogram

caused by assert foo when foo was an int with valid valid 0.

1 files changed, 2 insertions, 2 deletions

diff --git a/waitable_presence.py b/waitable_presence.py
index 8046bdc..1d6c3eb 100644
--- a/waitable_presence.py
+++ b/waitable_presence.py
@@ -98,8 +98,8 @@ class WaitablePresenceDetectorWithMemory(state_tracker.WaitableAutomaticStateTra
         if self.someone_is_home is None:
             raise Exception("Too Soon!")
         if self.someone_is_home:
-            assert self.someone_home_since
+            assert self.someone_home_since is not None
             return (True, self.someone_home_since)
         else:
-            assert self.everyone_gone_since
+            assert self.everyone_gone_since is not None
             return (False, self.everyone_gone_since)