[Minor] Dmarc_report: Fix return type

diff --git a/lualib/rspamadm/dmarc_report.lua b/lualib/rspamadm/dmarc_report.lua
index 1b0bc7f24a00cc75ddf3f5062ecf03ce433cac28..f459b506470c9feddd0f7779c71b2c7e24741848 100644 (file)
--- a/lualib/rspamadm/dmarc_report.lua
+++ b/lualib/rspamadm/dmarc_report.lua
@@ -491,7 +491,7 @@ local function prepare_report(opts, start_time, rep_key)
           {'DEL', rep_key})
     end
     logger.messagex('Cannot process reports for domain %s; invalid dmarc record', reporting_domain)
-    return 0
+    return nil
   end
 
   -- Get all reports for a domain