Fix for ImageNet

[pmeier]

fixes #1142

[codecov-io]

Codecov Report

Merging #1149 into master will decrease coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1149      +/-   ##
==========================================
- Coverage   65.71%   65.65%   -0.07%     
==========================================
  Files          70       70              
  Lines        5512     5511       -1     
  Branches      851      849       -2     
==========================================
- Hits         3622     3618       -4     
- Misses       1631     1633       +2     
- Partials      259      260       +1

Impacted Files	Coverage Δ
torchvision/datasets/imagenet.py	87.5% <100%> (-0.13%)	⬇️
torchvision/transforms/transforms.py	80.35% <0%> (-0.59%)	⬇️

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