Fix float zeros format (#5491)

* Fix float zeros format

* 255 to integer

detect.py

@@ -136,7 +136,7 @@ def run(weights=ROOT / 'yolov5s.pt',  # model.pt path(s)
         else:
             img = torch.from_numpy(img).to(device)
             img = img.half() if half else img.float()  # uint8 to fp16/32
-        img /= 255.0  # 0 - 255 to 0.0 - 1.0
+        img /= 255  # 0 - 255 to 0.0 - 1.0
         if len(img.shape) == 3:
             img = img[None]  # expand for batch dim
         t2 = time_sync()