don't attempt to force-load blocks if they're already loaded.

diff --git a/technic/machines/switching_station.lua b/technic/machines/switching_station.lua
index 0040f13066d80e1cc9d440d23013fe1517e04cb3..6b59277aeb0618f6402f3ec5bec081351a3d8d33 100644 (file)
--- a/technic/machines/switching_station.lua
+++ b/technic/machines/switching_station.lua
@@ -80,6 +80,7 @@ local add_new_cable_node = function(nodes, pos)
 end
 
 local load_position = function(pos)
+       if minetest.get_node_or_nil(pos) then return end
        local vm = VoxelManip()
        local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
 end