Treat empty intersection correctly in RenderLayer::getRectToExpose.
Created attachment 453184 [details] Patch
Created attachment 453210 [details] Patch
Committed r290770 (248014@main): <https://commits.webkit.org/248014@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 453210 [details].
<rdar://problem/89736117>
This caused the regression reported in bug 238033.