[Minor] Fix userdata storage

src/libserver/rspamd_symcache.c

@@ -931,6 +931,8 @@ rspamd_symcache_add_symbol (struct rspamd_symcache *cache,
 		 */
 		if (item->type & SYMBOL_TYPE_COMPOSITE) {
 			item->specific.normal.condition_cb = -1;
+			item->specific.normal.user_data = user_data;
+			g_assert (user_data != NULL);
 			g_ptr_array_add (cache->composites, item);
 
 			item->id = cache->items_by_id->len;

src/lua/lua_config.c

@@ -2431,7 +2431,7 @@ lua_config_add_composite (lua_State * L)
 
 				if (new) {
 					rspamd_symcache_add_symbol (cfg->cache, name,
-							0, NULL, NULL, SYMBOL_TYPE_COMPOSITE, -1);
+							0, NULL, composite, SYMBOL_TYPE_COMPOSITE, -1);
 				}
 
 				ret = TRUE;