olly ca3be996bc Add proper exception checks when returning to native from Java.
The pending exception will be thrown upon returning to Java
from native, but we should return early rather than continuing
to execute the native method to the end so as to avoid undefined
behavior. Note that the return value is irrelevant (because the
pending exception will be thrown).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184119606
2018-02-01 15:22:32 +00:00
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