Update yolo.py

Author: ppogg

models/yolo.py

@@ -11,7 +11,7 @@
 from models.common import *
 from models.experimental import *
 from utils.autoanchor import check_anchor_order
-from utils.general import make_divisible, check_file, set_logging
+from utils.general import make_divisible, check_file, set_logging, xywh2xyxy
 from utils.torch_utils import time_synchronized, fuse_conv_and_bn, model_info, scale_img, initialize_weights, \
     select_device, copy_attr