Without the memset() there is a risk of leaking uninitialized stack memory in the
get_next_device_request wineserver call.

BindToObject fails in this case.

ieframe: Properly test events when container doesn't support IOleCommandTarget add added more tests.

ieframe: Use stored IOleCommandTarget in Exec implementation and get rid of no longer needed exec in IDocHostContainerVtbl.

Not sending the brought-forward event for a click that was sent was an artifact
of a time when that branch was only used for posting a request for focus.  When
I added the brought-forward event, I didn't reconsider that logic.