And remove write only variable

Too many functions are not related to freetype and could be used by
other renderers like QuartText or DirectWrite.
Moreover, this file was way too long.

This is just the beginning, and there are no functionnal change so far.

It is a QFrame, so it is already parented and should work fine.
Fixes crash-on-quit in Qt5

Ref #8532

Ref #8532

This fixes a potential NULL pointer dereference and also enables the marq
filter to use the user specified font.
Reported-by: Tillmann Karras <tillmann@selfnet.de>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Nobody would use this in real life (even time offset bookmarks are
hardly used at all), the "feature" was unreachable from the UI, and
it does not work with most demuxers.

seekpoint_t.i_byte_offset is kept due to other usage of the same
structure, i.e. proper seek points (as opposed to bookmarks).

This is useless given that the time offset is set and the input core
ignores the byte offset when the time offset is set. I think the column
should probably be removed completely.

Close #9234

This is intended for VDR directories and Video CDs.