Fix wlr_output_transform_compose
It was like this probably because we inverted flipped-90 and flipped-270 in the past.
Test plan: check that damage tracking works with all transforms.
Fixes #796 (closed)
It was like this probably because we inverted flipped-90 and flipped-270 in the past.
Test plan: check that damage tracking works with all transforms.
Fixes #796 (closed)