Solving issue 178, errorbuild warnings on Mac.

This CL continues the work of solving issue 178. A small change in one file.
Review URL: http://webrtc-codereview.appspot.com/330006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1227 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed