Mine: fix move

turtles/mine.lua

@@ -68,24 +68,28 @@ end
 function go_to(dh, dd, ds)
     go_to_depth(0)
 
-    while height > dh do
-        turtle.down()
-        height = height - 1
-    end
-    while height < dh do
-        turtle.up()
-        height = height + 1
+    if height ~= dh then
+        while height > dh do
+            turtle.down()
+            height = height - 1
+        end
+        while height < dh do
+            turtle.up()
+            height = height + 1
+        end
     end
 
-    turn_abs(1)
+    if side ~= ds then
+        turn_abs(1)
 
-    while side > ds do
-        turtle.back()
-        side = side - 1
-    end
-    while side < ds do
-        turtle.forward()
-        side = side + 1
+        while side > ds do
+            turtle.back()
+            side = side - 1
+        end
+        while side < ds do
+            turtle.forward()
+            side = side + 1
+        end
     end
 
     go_to_depth(dd)
@@ -135,7 +139,7 @@ function find_next_shaft()
 
     while true do
         print("Climb")
-        for hei=0,MAX_HEIGHT-1 do
+        for hei=1,MAX_HEIGHT-1 do
             if (hei % 3) == 0 then
                 if turtle.detect() then
                     return