fts-flatcurve: Fix mailbox leak if it couldn't be opened

This could also result in a crash:
Panic: file mail-user.c: line 185 (mail_user_deinit): assertion failed: ((*user)->refcount == 1)

diff --git a/src/plugins/fts-flatcurve/fts-backend-flatcurve.c b/src/plugins/fts-flatcurve/fts-backend-flatcurve.c
index e02bae005c1063b5aabd6d745a3757d168b889d8..67d1020b17a672ccdd216e6d044b17b07f928129 100644 (file)
--- a/src/plugins/fts-flatcurve/fts-backend-flatcurve.c
+++ b/src/plugins/fts-flatcurve/fts-backend-flatcurve.c
@@ -540,6 +540,7 @@ fts_backend_flatcurve_iterate_ns(struct fts_backend *_backend,
                        backend, box, &error) < 0) {
                        e_error(backend->event, "%s", error);
                        failed = TRUE;
+                       mailbox_free(&box);
                        continue;
                }