Use proper printf size_t specifier to fix Linux 32-bit build.

http://code.google.com/p/webrtc/issues/detail?id=97
Review URL: http://webrtc-codereview.appspot.com/204001

git-svn-id: http://webrtc.googlecode.com/svn/trunk@704 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed