fix:tiny bug in main_mlc.py

[UnityBoy]

fix:tiny bug in main_mlc.py

line 405

                'arch': args.arch,

should be

'arch': args.backbone,

or you should add another arch args

[sorrowyn]

    available_models = ['Q2L-R101-448', 'Q2L-R101-576', 'Q2L-TResL-448', 'Q2L-TResL_22k-448', 'Q2L-SwinL-384', 'Q2L-CvT_w24-384']
    parser = argparse.ArgumentParser(description='Query2Label MSCOCO Training')
    parser.add_argument('--dataname', help='dataname', default='coco14', choices=['coco14'])
    parser.add_argument('--dataset_dir', help='dir of dataset', default='/comp_robot/liushilong/data/COCO14/')
    parser.add_argument('--img_size', default=448, type=int,
                        help='size of input images')

    parser.add_argument('-a', '--arch', metavar='ARCH', default='Q2L-R101-448',
                        choices=available_models,
                        help='model architecture: ' +
                            ' | '.join(available_models) +
                            ' (default: Q2L-R101-448)')

    parser.add_argument('--output', metavar='DIR', 
                        help='path to output folder')
    parser.add_argument('--num_class', default=80, type=int,
                        help="Number of query slots")
    parser.add_argument('--pretrained', dest='pretrained', action='store_true',
                        help='use pre-trained model. default is False. ')
    parser.add_argument('--optim', default='AdamW', type=str, choices=['AdamW', 'Adam_twd'],
                        help='which optim to use')