sw: fix a11y crash on double Dispose

When testing with the bugdoc for tdf#107126, it happend that upon
applying a page style, SwAccessibleContext::Dispose() was called twice,
and that's not supposed to happen (and crashes, too, at least inside
an assertion).

There was an Action that queued up a bunch of events, but the Action did
not complete formatting the document, so right after that during Paint
more formatting happened and then the FireEvents() called Dispose()
and InvalidatePosOrSize() called it again.  Guess we shouldn't generate
events for objects that we know are disposed due to not being visible.

Change-Id: I5a0f04c0f32ee5e949b552f7a373c10ceee5c279

0 files changed, 0 insertions, 0 deletions