[Minor] Slightly refactor set iteration

contrib/libucl/khash.h

@@ -583,6 +583,14 @@ static kh_inline khint_t __ac_Wang_hash(khint_t key)
 		code;												\
 	} }
 
+#define kh_foreach_key(h, kvar, code) {						\
+	khint_t __i;											\
+	for (__i = kh_begin(h); __i != kh_end(h); ++__i) {		\
+		if (!kh_exist(h,__i)) continue;						\
+		(kvar) = kh_key(h,__i);								\
+		code;												\
+	} }
+
 /* More conenient interfaces */
 
 /*! @function

src/libserver/events.c

@@ -309,17 +309,13 @@ void
 rspamd_session_cleanup (struct rspamd_async_session *session)
 {
 	struct rspamd_async_event *ev;
-	int i;
 
 	if (session == NULL) {
 		msg_err ("session is NULL");
 		return;
 	}
 
-	for (i = kh_begin (session->events); i != kh_end (session->events); i ++) {
-		if (!kh_exist (session->events, i)) continue;
-		ev = kh_key (session->events, i);
-
+	kh_foreach_key (session->events, ev, {
 		/* Call event's finalizer */
 		msg_debug_session ("removed event on destroy: %p, subsystem: %s",
 				ev->user_data,
@@ -328,7 +324,7 @@ rspamd_session_cleanup (struct rspamd_async_session *session)
 		if (ev->fin != NULL) {
 			ev->fin (ev->user_data);
 		}
-	}
+	});
 
 	kh_clear (rspamd_events_hash, session->events);
 }