ole32:fix CoWaitForMultipleHandles cause RPC hang (try 2)

[Changhui Liu]

Superseded patch 108194:
http://source.winehq.org/patches/data/108194


Change log:
try 2: pass test on testbot.winehq.org and on this:
https://github.com/wine-compholio/wine-staging/blob/master/patches/ole32-CoWaitForMultipleHandles/0001-ole32-tests-Add-additional-tests-for-CoWaitForMultip.patch
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