Target and input sizes mismatch warning in L1 Loss / L1 Smooth Loss (#18565)
Summary:
Addind the same warning message already present in the mse_loss function to the L1 losses when input and target sizes are different.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18565
Differential Revision: D14671415
Pulled By: soumith
fbshipit-source-id: 01f5e1fb1ea119dbb2aecf1d94d0cb462f284982
