# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1422630805 -3600
# Node ID 464a0f3f82754c37f8b45e04ffb985891271c65a
# Parent  9e3d700236912f74745674dd82339611bfc2f84b
Introduce start-of-day time points unconditionally, so that events can be added
before others on any given day.

diff -r 9e3d70023691 -r 464a0f3f8275 imiptools/period.py
--- a/imiptools/period.py	Fri Jan 30 13:30:57 2015 +0100
+++ b/imiptools/period.py	Fri Jan 30 16:13:25 2015 +0100
@@ -199,7 +199,7 @@
 
     new_slots = []
     current_date = None
-    previously_active = None
+    previously_active = []
 
     for point, active in slots:
         start_of_day = get_start_of_day(point)
@@ -213,7 +213,7 @@
 
             # Add any continuing periods.
 
-            if point != start_of_day and previously_active:
+            if point != start_of_day:
                 new_slots.append((start_of_day, previously_active))
 
         # Add the currently active periods at this point in time.