iOS 9 Analyzer potential leak

[mruvim]

Xcode analyzer returns two potential leaks on iOS 9

Version: Analytics 3.0.7

Issues:
SEGReachability.m:115:9: Potential leak of an object stored into 'ref'
SEGReachability.m:131:9: Potential leak of an object stored into 'ref'

Steps to reproduce

• Add library to a project
• Run Xcode analyzer

[dbburgess]

I think these are fixed by #517.

[f2prateek]

Closed by #551