diff -upr bijiben-3.15.3.old/src/libbiji/provider/biji-memo-provider.c bijiben-3.15.3/src/libbiji/provider/biji-memo-provider.c
--- bijiben-3.15.3.old/src/libbiji/provider/biji-memo-provider.c	2015-02-17 14:03:37.742656755 +0100
+++ bijiben-3.15.3/src/libbiji/provider/biji-memo-provider.c	2015-02-17 13:56:39.603674760 +0100
@@ -75,6 +75,9 @@ time_val_from_icaltime (icaltimetype *it
   GTimeVal t;
   gchar *iso;
 
+  if (!itt)
+    return FALSE;
+
   t.tv_sec = 0;
   t.tv_usec = 0;
 
@@ -98,6 +101,9 @@ icaltime_from_time_val (glong t, icaltim
   GTimeVal tv;
   GDate    *date;
 
+  if (!out)
+    return FALSE;
+
   tv.tv_sec = t;
   tv.tv_usec = 0;
 
