Handling numel() == 0 in convTranspose (#21652)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21652
Diff fixes issue of empty ROIs for convTranspose
Issue StackTrace: P65374505
Reviewed By: jerryzh168
Differential Revision: D15766739
fbshipit-source-id: 39cf8feca66b6aae22ff4ec5c1b6a4e3f20f378d
