Fix Win64 build breakage

This is for landing https://webrtc-codereview.appspot.com/1096006/ by Justin Schuh.

Stable will be updated after this has landed.

Review URL: https://webrtc-codereview.appspot.com/1091008

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3484 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/video_coding/main/source/video_coding.gypi

@@ -94,6 +94,8 @@
         'timing.cc',
         'video_coding_impl.cc',
       ], # source
+      # TODO(jschuh): Bug 1348: fix size_t to int truncations.
+      'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }