[PATCH 1/4] ole32: Fix some races in the global interface table implementation.

[Robert Shearman]

Fix a race between RevokeInterfaceFromGlobal and GetInterfaceFromGlobal 
by only using the entry inside the critical section.

Fix a race between two GetInterfaceFromGlobal by cloning the stream, 
instead of using it and setting the current position back to zero.
---
  dlls/ole32/git.c |   55 
+++++++++++++++++++++++++++++++----------------------
  1 files changed, 32 insertions(+), 23 deletions(-)

The second issue could also have been solved by extending the critical 
section around the CoUnmarshalInterface, but this would have been bad 
for performance.
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