Fix off-by-one error in checkInclusion.

[jsha]

If tree size is X, the highest value we can have for end in get-entries is X-1.

[coveralls]

Pull Request Test Coverage Report for Build 570

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 67.809%

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Totals
Change from base Build 537:	0.0%
Covered Lines:	811
Relevant Lines:	1196

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💛 - Coveralls