Fixed the thread index.

* Modifications could result in index changes because we lost the
threadId due to remove + add. A modify was necessary (although we can
ignore it for the email case).
* The ThreadIndexer would try to lookup and potentially index threads
for empty parent ids, which is clearly wrong.

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/mailthreadtest.h b/tests/mailthreadtest.h
index 6b64d4e..9ae1b4c 100644
--- a/tests/mailthreadtest.h
+++ b/tests/mailthreadtest.h
@@ -54,6 +54,7 @@ private slots:
     void testListThreadLeader();
     void testIndexInMixedOrder();
     void testRealWorldThread();
+    void testNoParentsWithModifications();
 };
 
 }