srt: Factor out last goto

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Merge pull request #21 from dwbuiten/srtgoto2

srt: Factor out last goto
Fix crash in block cache aging

Bug introduced in e2a11f2d90323695f99972690592a43237ee26a8
Merge pull request #22 from lachs0r/master

Fix crash in block cache aging
Update Hungarian translation

Closes #1836.
Fix crash on a certain kind of malformed shift times history file
Update the selection and scroll position after opening subtitles from video