Incorrectly positioning section Headers for sections with no items (headers only) #2
Description
In a collection view similar to the "SwiftNetworkImages" demo, the first section is used for the global section, and the second section, with a floating header, is where items are displayed.
When a fetch returns no data, the header of the 2nd section is displayed at offset 0,0, instead of under the top section. The issues is caused inside boundaryMetrics, which returns (0, 0) for empty sections.
Please see a fix to this issue in a separate fork.