Fix for warning in GCC 4.6
Fix for warning in GCC 4.6

Upstream copy of a fix provided in http://codereview.chromium.org/9309007/.

BUG=none
TEST=neteq_unittests

Review URL: https://webrtc-codereview.appspot.com/383002

git-svn-id: 9b397c5dfe384c04b1b200d5305b653241000171@1596 4adac7df-926f-26a2-2b94-8c16560cd09d

lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override