[PATCH] lib: Fix endless upgrade problem

[Austin Clements]

48db8c8 introduced a disagreement between when
notmuch_database_needs_upgrade returned TRUE and when
notmuch_database_upgrade actually performed an upgrade.  As a result,
if a database had a version less than 3, but no new features were
required, notmuch new would call notmuch_database_upgrade to perform
an upgrade, but notmuch_database_upgrade would return immediately
without updating the database version.  Hence, the next notmuch new
would do the same, and so on.

Fix this by ensuring that the upgrade-required logic is identical
between the two.
---
 lib/database.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/database.cc b/lib/database.cc
index 5116188..a3a7cd3 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -1222,7 +1222,7 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
     target_features = notmuch->features | NOTMUCH_FEATURES_CURRENT;
     new_features = NOTMUCH_FEATURES_CURRENT & ~notmuch->features;
 
-    if (! new_features)
+    if (! notmuch_database_needs_upgrade (notmuch))
 	return NOTMUCH_STATUS_SUCCESS;
 
     if (progress_notify) {
-- 
2.0.0