turtle: fix tlang integration

clientmods/turtle/init.lua

@@ -278,26 +278,33 @@ minetest.register_chatcommand("quarry", {
 
 
 turtle.states = {}
+turtle.states_available = false
 
 function turtle.schedule(name, state)
-    turtle.states[#turtle.states] = {name = name, state = state}
+    turtle.states[#turtle.states + 1] = {name = name, state = state}
+    turtle.states_available = true
 end
 
-function turtle.run_states()
+function turtle.run_states(dtime)
+    if turtle.states_available then
         local dead = {}
+
         for i, v in ipairs(turtle.states) do
             local ret = tlang.step(v.state)
             if ret ~= true then
                 if type(ret) == "string" then
                     minetest.display_chat_message("Turtle/tlang ERROR in " .. v.name .. ": " .. ret)
                 end
-            dead[#dead] = i
+                dead[#dead + 1] = i
             end
         end
 
         for i, v in ipairs(dead) do
             table.remove(turtle.states, v)
         end
+
+        turtle.states_available = #turtle.states ~= 0
+    end
 end
 
 minetest.register_globalstep(turtle.run_states)

clientmods/turtle/tlang_vm.lua

@@ -292,8 +292,12 @@ end
 function builtins.print(state)
     local value = statepop(state)
 
+    if minetest then
+        minetest.display_chat_message("Tlang: " .. tostring(value.value))
+    else
         print(value.value)
     end
+end
 
 function builtins.dup(state)
     statepush(state, statepeek(state))