Incorrectly pinned section at the bottom of list view

[nonahex]

Hello,
thanks for this library.
One small bug I discovered, there is an incorrect pinning a section, if list contains only Sections.

As you can see, Section 'O' is incorrectly pinned and not moved away. This happens only at the end of the list, with last shown item.

Correctly, it should be shown like this

I found out, issue is caused by wrong compare sign in method
int findFirstVisibleSectionPosition(int firstVisibleItem, int visibleItemCount)
at line 282, currently there is
if (firstVisibleItem + visibleItemCount >= adapter.getCount()) return -1; // dataset has changed, no candidate
and shoud be
if (firstVisibleItem + visibleItemCount > adapter.getCount()) return -1; // dataset has changed, no candidate

After shis adjustment, sections are shown correctly even in case shown above and there was no problem even in stadard use cases.

Hope, this will help someone.