[PUSHED][REVIEW-3-6] fix for fdo#54074, fdo#53364 and maybe for fdo#49520, don't delete broadcasters in formula cells twice

[Noel Power]

On 28/08/12 18:02, Markus Mohrhard wrote:
> Hey,
>
> [1] fixes a serious bug in calc that happens in a formula cell with a
> broadcaster that has listeners is deleted. The problem is that the
> Broadcaster is deleted twice. Once as part of the ScFormulaCell and
> once as part of the ScNoteCell that is used as replacement for the
> ScFormulaCell.
>
> We need to release the broadcaster from ScFormulaCell because the
> ScNoteCell is taking over control and is only there to keep track of
> the Broadcaster.
>
yes, I was in parallel looking at the same thing and at least fdo#54074, 
fdo#53364 are definitely fixed by this

Noel