Fix the assertion failure when live_range is null

[sj-i]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 6973566205

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• 1 of 2 (50.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.01%) to 84.233%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Lib/PhpInternals/Types/Zend/ZendOpArray.php	1	2	50.0%

Totals
Change from base Build 6973538474:	-0.01%
Covered Lines:	4867
Relevant Lines:	5778

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💛 - Coveralls