Add change_level() native.

plugins/admincmd.sma

@@ -654,7 +654,7 @@ public cmdSlap(id, level, cid)
 
 public chMap(map[])
 {
-	server_cmd("changelevel %s", map)
+	change_level(map);
 }
 
 public cmdMap(id, level, cid)

plugins/include/amxmodx.inc

@@ -84,6 +84,19 @@ native precache_sound(const name[]);
 /* Precaches any file. */
 native precache_generic(const szFile[]);
 
+/**
+ * Changes map.
+ *
+ * @note  This calls the pfnChangelLevel engine function.
+ * @note  This has the same behavior as calling "changelevel" server command,
+ *        but this will trigger properly server_changelevel() forward.
+ *
+ * @aparam map          The map name to change.
+ *
+ * @noreturn
+ */
+native change_level(const map[]);
+
 /* Sets info for player. */
 native set_user_info(index,const info[],const value[]);
 

plugins/mapsmenu.sma

@@ -321,7 +321,7 @@ public cmdMapsMenu(id, level, cid)
 }
 
 public delayedChange(mapname[])
-	server_cmd("changelevel %s", mapname)
+	change_level(mapname)
 
 public actionVoteMapMenu(id, key)
 {

plugins/nextmap.sma

@@ -118,7 +118,7 @@ public delayedChange(param[])
 	if (g_mp_chattime) {
 		set_pcvar_float(g_mp_chattime, get_pcvar_float(g_mp_chattime) - 2.0)
 	}
-	server_cmd("changelevel %s", param)
+	change_level(param)
 }
 
 public changeMap()