Fix stream! error when :from is greater than the last event number

[bminevsb]

Fix for https://github.com/NFIBrokerage/spear/issues/67

[coveralls]

Pull Request Test Coverage Report for Build 7e832a436c184d693db80e19ee9a942ce400b0a9-PR-68

• 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 100.0%

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Totals
Change from base Build a2b9a6ac5de6cf74ae2f6f7c336c8b9efe10219e:	0.0%
Covered Lines:	642
Relevant Lines:	642

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💛 - Coveralls