Talk: fixes warning: local variable is initialized but not referenced due to only using the variable in question for asserts.
Talk: fixes warning: local variable is initialized but not referenced due to only using the variable in question for asserts.

BUG=N/A
R=mallinath@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/11249004

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@5848 4adac7df-926f-26a2-2b94-8c16560cd09d

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