[bijiben] memo-provider: Crash opening memo

[Isaque Galdino de Araujo <igaldino src gnome org>]

commit 1649d3a3d3bae9972ea89f08f78aea5b93cb96d6
Author: Milan Crha <mcrha redhat com>
Date:   Sun Jun 11 15:46:20 2017 -0300

    memo-provider: Crash opening memo
    
    Application is crashing when trying to open a memo from the memo list.
    
    Code is not checking for null when processing start, last modified and
    created dates.
    
    This patch fixes that.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782998

 src/libbiji/provider/biji-memo-provider.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/libbiji/provider/biji-memo-provider.c b/src/libbiji/provider/biji-memo-provider.c
index fa0540f..975cd11 100644
--- a/src/libbiji/provider/biji-memo-provider.c
+++ b/src/libbiji/provider/biji-memo-provider.c
@@ -75,6 +75,9 @@ time_val_from_icaltime (icaltimetype *itt, glong *result)
   GTimeVal t;
   gchar *iso;
 
+  if (!itt)
+    return FALSE;
+
   t.tv_sec = 0;
   t.tv_usec = 0;