From a66e0f31ae0fd4a8a95df4b8cd49ac4d17e953e2 Mon Sep 17 00:00:00 2001
From: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>
Date: Sun, 29 Jan 2023 13:49:00 +0100
Subject: [PATCH] sanity check for ``minetest.encode_png

---
 init.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/init.lua b/init.lua
index 01ddefd..426cbdd 100644
--- a/init.lua
+++ b/init.lua
@@ -1,5 +1,8 @@
 local MP = minetest.get_modpath("otp")
 
+-- sanity checks
+assert(type(minetest.encode_png) == "function")
+
 otp = {
     -- mod storage
     storage = minetest.get_mod_storage(),