Check number of pages when next/prev clicked

init.lua

@@ -650,6 +650,10 @@ local function on_receive_fields(player, fields)
 		show_fs(player, player_name)
 
 	elseif fields.prev or fields.next then
+		if data.pagemax == 1 then
+			return
+		end
+
 		data.pagenum = data.pagenum - (fields.prev and 1 or -1)
 		if data.pagenum > data.pagemax then
 			data.pagenum = 1