Review Request 22054: Fixed MESOS-1427: 'friend' statement in Variable resolved to a different State class on clang 3.2

[Jiang Yan Xu]

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Review request for mesos, Benjamin Hindman and Dominic Hamon.


Bugs: MESOS-1427
    https://issues.apache.org/jira/browse/MESOS-1427


Repository: mesos-git


Description
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See summary.


Diffs
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  src/state/protobuf.hpp 802617b48586d8fc682d5efda3e2b86205e988b6 

Diff: https://reviews.apache.org/r/22054/diff/


Testing
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make check on clang 3.2


Thanks,

Jiang Yan Xu