talkatu/talkatu

Add a missing prototype to talkatuscrolledwindow.h

2020-08-20, Gary Kramlich
3b6c635cef20
Add a missing prototype to talkatuscrolledwindow.h

Add a prototype for talkatu_scrolled_window_page_down as it was missed initially.

Reviewed at https://reviews.imfreedom.org/r/73/
# h1
## h2
### h3
#### h4
##### h5
###### h6
plain *emphasis* _emphasis_ ~~**strong**~~ __strong__ `code` plain
[Test link](https://pidgin.im)
`code`
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code?
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