If present, only use alpha channel for bounding box#4454

Merged

hugovk merged 2 commits intopython-pillow:masterfrom radarhere:bbox

Mar 5, 2020

+47-18

Commits on Feb 28, 2020

If an alpha channel is present, only use that to get bounding box
radarhere
committed

Commits on Mar 5, 2020

Document getbbox change for images with alpha [ci skip]
radarhere
committed