Fix a few accidental globals

rail.lua

@@ -135,7 +135,7 @@ function get_railstatus(fppos, direction, speed)
     end
 
     -- Use rounded position for all lookups and calculations in here
-    pos = vector.round(fppos)
+    local pos = vector.round(fppos)
 
     local current_node =  minetest.get_node(pos)
 
@@ -147,7 +147,7 @@ function get_railstatus(fppos, direction, speed)
         return {railtype="inv"}
     end
 
-    status = {}
+    local status = {}
 
     -- Get all surrounding nodes. This builds a little cache of all the
     -- surrounding nodes we might need to look at.
@@ -164,7 +164,7 @@ function get_railstatus(fppos, direction, speed)
         surrounds[name] = minetest.get_node(pos)
         surrounds[name.."_pos"] = pos
     end
-    surrounds = {}
+    local surrounds = {}
     getsur("x_prev", {x=pos.x-1,y=pos.y,z=pos.z}, surrounds)
     getsur("x_next", {x=pos.x+1,y=pos.y,z=pos.z}, surrounds)
     getsur("z_prev", {x=pos.x,y=pos.y,z=pos.z-1}, surrounds)