fix missing command line arguments

labelImg.py

@@ -1412,10 +1412,10 @@ def get_main_app(argv=[]):
     return app, win
 
 
-def main(argv=[]):
+def main():
     '''construct main app and run it'''
-    app, _win = get_main_app(argv)
+    app, _win = get_main_app(sys.argv)
     return app.exec_()
 
 if __name__ == '__main__':
-    sys.exit(main(sys.argv))
+    sys.exit(main())