Iglistkit: List load more data bugs

[Layney]

New issue checklist

• [x] I have reviewed the README and documentation
• [x] I have searched existing issues and this is not a duplicate
• [ ] I have attempted to reproduce the issue and include an example project.

General information

• IGListKit version:newest
• iOS version(s):any
• CocoaPods/Carthage version:newest
• Xcode version:any
• Devices/Simulators affected:
• Reproducible in the demo project? (Yes/No):Yes
• Related issues:

Debug information

# Please include debug logs using the following lldb command:
po [IGListDebugger dump]

when i load more data,and the cell using adaptive altitude,list contentsize error.

[Ziewvater]

Hey Layney, can you give more detail about what's happening? More specific data about which version you're experiencing this problem with and a simple demo app that reproduces the issue would be helpful.