[PATCH] ole32: Request the needed memory blocks at once.

[Esme Povirk (she/they)]

Signed-off-by: Esme Povirk <esme at codeweavers.com>
In theory, if we want to minimize the number of calls to
ILockBytes_SetSize, we should do the check based on 1 block, but set
the size based on neededAddNumBlocks. But I'm not sure it's worth the
added complexity to do that.