close input with f:close instead of f.close (bat_freebsd)

widgets/bat_freebsd.lua

@@ -22,7 +22,7 @@ local function worker(format, warg)
             bat_info[key] = value
         end
     end
-    f.close()
+    f:close()
 
     -- current state
     local state

widgets/fanspeed_freebsd.lua

@@ -21,7 +21,7 @@ local function worker(format, warg)
         -- use negative fanspeed to indicate error
         return {-1}
     else
-        return {tonumber(fanspeed, 10)}
+        return {tonumber(fanspeed)}
     end
 end