vcl: Use std::list to manage OpenGLContexts in ImplSVGDIData

... instead of manually implementing a doubly-linked
list.

(All entries are non-null, so no need for
keeping null checks where they were previously only
used to check whether there is a previous/next element.)

Change-Id: Iff56b21e36b705803718b594e6d9ec66a85fa698
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/202455
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions