[Minor] Learn to cycle back on unsigned

src/libserver/rspamd_symcache.h

  */
 gboolean rspamd_symcache_process_symbols(struct rspamd_task *task,
 										 struct rspamd_symcache *cache,
-										 gint stage);
+										 guint stage);
 
 /**
  * Return statistics about the cache as ucl object (array of objects one per item)

src/libserver/symcache/symcache_c.cxx

 gboolean
 rspamd_symcache_process_symbols(struct rspamd_task *task,
 								struct rspamd_symcache *cache,
-								gint stage)
+								guint stage)
 {
 	auto *real_cache = C_API_SYMCACHE(cache);
 

src/libserver/symcache/symcache_runtime.cxx

-/*-
- * Copyright 2022 Vsevolod Stakhov
+/*
+ * Copyright 2023 Vsevolod Stakhov
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
 	return nullptr;
 }
 
-auto symcache_runtime::process_symbols(struct rspamd_task *task, symcache &cache, int stage) -> bool
+auto symcache_runtime::process_symbols(struct rspamd_task *task, symcache &cache, unsigned int stage) -> bool
 {
 	msg_debug_cache_task("symbols processing stage at pass: %d", stage);
 
 auto symcache_runtime::process_pre_postfilters(struct rspamd_task *task,
 											   symcache &cache,
 											   int start_events,
-											   int stage) -> bool
+											   unsigned int stage) -> bool
 {
 	auto saved_priority = std::numeric_limits<int>::min();
 	auto all_done = true;

src/libserver/symcache/symcache_runtime.hxx

-/*-
- * Copyright 2022 Vsevolod Stakhov
+/*
+ * Copyright 2023 Vsevolod Stakhov
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
 	auto process_symbol(struct rspamd_task *task, symcache &cache, cache_item *item,
 						cache_dynamic_item *dyn_item) -> bool;
 	/* Specific stages of the processing */
-	auto process_pre_postfilters(struct rspamd_task *task, symcache &cache, int start_events, int stage) -> bool;
+	auto process_pre_postfilters(struct rspamd_task *task, symcache &cache, int start_events, unsigned int stage) -> bool;
 	auto process_filters(struct rspamd_task *task, symcache &cache, int start_events) -> bool;
 	auto check_metric_limit(struct rspamd_task *task) -> bool;
 	auto check_item_deps(struct rspamd_task *task, symcache &cache, cache_item *item,
 	 * @param stage
 	 * @return
 	 */
-	auto process_symbols(struct rspamd_task *task, symcache &cache, int stage) -> bool;
+	auto process_symbols(struct rspamd_task *task, symcache &cache, unsigned int stage) -> bool;
 
 	/**
 	 * Finalize execution of some item in the cache

src/libserver/task.c

 		}
 	}
 
-	for (guint i = m->nactions - 1; i >= 0; i--) {
+	for (guint i = m->nactions; i-- > 0;) {
 		struct rspamd_action_config *action_lim = &m->actions_config[i];