enable smoke effects only if nodecore.smokeclear is present, to prevent bad behavior on current nodecore stable

rules.lua

@@ -27,6 +27,19 @@ local solid_drawtypes = {
     glasslike_framed = true,
 }
 
+local smokecontrol
+if nodecore.smokeclear then
+    smokecontrol = function(pos, smoke)
+        if smoke then
+            nodecore.smokefx(pos, 300, 2)
+        else
+            nodecore.smokeclear(pos)
+        end
+    end
+else
+    smokecontrol = function(pos, smoke) end
+end
+
 --[[
 E: air
 E_: other empty
@@ -324,12 +337,12 @@ function lc_liberties.handle_placement(pos)
     for x=pos.x-18, pos.x+18 do
         for z=pos.z-18, pos.z+18 do
             if (x ~= pos.x) or (z ~= pos.z) then
-                nodecore.smokeclear({x = x, y = pos.y, z = z})
+                smokecontrol({x = x, y = pos.y, z = z})
             end
         end
     end
 
-    nodecore.smokefx(pos, 300, 2)
+    smokecontrol(pos, 1)
 end
 
 function lc_liberties.handle_territory_fill(itemstack, placer, pointed_thing)
@@ -371,7 +384,7 @@ function lc_liberties.handle_dig(pos, node, digger)
         local count = 0
         for i, v in pairs(connected_group(pos)) do
             count = count + 1
-            nodecore.smokeclear(v)
+            smokecontrol(v)
             nodecore.set_loud(v, {name = "air"})
         end
 
@@ -379,7 +392,7 @@ function lc_liberties.handle_dig(pos, node, digger)
 
         return true
     else
-        nodecore.smokeclear(pos)
+        smokecontrol(pos)
         return minetest.node_dig(pos, node, digger)
     end
 end