Avoid gmime asserts if no recipients are passed from MTA.

diff --git a/src/expressions.c b/src/expressions.c
index 21409c81e44ace45284d80d66869eb901f5991fa..24540b44c41c568c884076999f74f8e0cb1b0cdf 100644 (file)
--- a/src/expressions.c
+++ b/src/expressions.c
@@ -1406,6 +1406,9 @@ rspamd_recipients_distance (struct worker_task *task, GList * args, void *unused
                return FALSE;
        }
 
+       if (!task->rcpts) {
+               return FALSE;
+       }
        num = internet_address_list_length (task->rcpts);
        if (num < MIN_RCPT_TO_COMPARE) {
                return FALSE;