mdbox: Don't assert-crash when having to open mail file during specific copying situa...

diff --git a/src/lib-storage/index/dbox-multi/mdbox-save.c b/src/lib-storage/index/dbox-multi/mdbox-save.c
index dcb19f8a95598c0557f8200f4c38c616d2b22d7c..52c6aac309eee253681670cd0e8cd2ab75963694 100644 (file)
--- a/src/lib-storage/index/dbox-multi/mdbox-save.c
+++ b/src/lib-storage/index/dbox-multi/mdbox-save.c
@@ -58,7 +58,7 @@ mdbox_copy_file_get_file(struct mailbox_transaction_context *t,
        rec = data;
 
        if (mdbox_map_lookup(ctx->mbox->storage->map, rec->map_uid,
-                            &file_id, offset_r) <= 0)
+                            &file_id, offset_r) < 0)
                i_unreached();
 
        return mdbox_file_init(ctx->mbox->storage, file_id);