[Java]: Correct logic for dealing with returning default values when a message extension.
[C#]: #211 - Correct logic for dealing with returning default values when a message extension.
Merge pull request #212 from csoroiu/master

[C#]: #211 - Correct logic for dealing with returning default values when a message extension.
pre-release version set
Merge branch 'master' into jdk6backport(android)