fix var declaration order

src/kiri/export.js

@@ -123,6 +123,7 @@
         SDB['kiri-print-seq'] = printSeq++;
 
         let settings = API.conf.get(),
+            MODE = API.mode.get_id(),
             names = API.widgets.all()
                 .map(w => w.meta ? w.meta.file : undefined)
                 .filter(v => v)
@@ -130,7 +131,6 @@
                 .map(v => v.substring(0,20))
                 .map(v => v.split('.')[0]),
             name = names[0] || (MODE === MODES.CAM ? "cnc" : "print"),
-            MODE = API.mode.get_id(),
             pre = `${name}-${(printSeq.toString().padStart(3,"0"))}`,
             filename = pre,// + (new Date().getTime().toString(36)),
             fileext = settings.device.gcodeFExt || "gcode",