Cocoa manages an autorelease pool on the main thread, but it only drains it
when it processes an event.  Our requests come through a run loop source, which
doesn't count as an event.  So, autoreleased objects can accumulate when the
app is not being interacted with.
Signed-off-by: Ken Thomases <ken@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>