Add ErrNoChange check when using Up.

[Glyphack]

Since not checking ErrNoChange on Up function could cause errors and I encountered it. I updated this code to help others.
#100

[coveralls]

Pull Request Test Coverage Report for Build 668

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 52.382%

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Totals
Change from base Build 667:	0.0%
Covered Lines:	2496
Relevant Lines:	4765

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 668

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 52.382%

---

Totals
Change from base Build 667:	0.0%
Covered Lines:	2496
Relevant Lines:	4765

---

💛 - Coveralls

[dhui]

Thanks for the PR!