Avoided the possibility that a patch with 0 area is cropped. (#2704)
Avoided the possibility that a patch with 0 area is cropped. (#2704)

Co-authored-by: wangxinjiang <e5f21fec83af0b7901c2a83b9ca1a384d7f53db9@sensetime.com>
open-mmlab/mmdetection,open-mmlab/mmdetection