lib: clear error message on success in _choose_database_path

Previously we both found a database and returned a message saying that
the database could not be found (along with a success code). This
change should prevent spurious error output.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/open.cc b/lib/open.cc
index 005872dc..463e38bf 100644
--- a/lib/open.cc
+++ b/lib/open.cc
@@ -249,6 +249,11 @@ _choose_database_path (notmuch_database_t *notmuch,
 	return NOTMUCH_STATUS_NO_DATABASE;
     }
 
+    if (*message) {
+	free (*message);
+	*message = NULL;
+    }
+
     return NOTMUCH_STATUS_SUCCESS;
 }