Fixing the build error on Windows.
Problem is in coversion from size_t to int.

TBR=wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2189004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4698 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/media/base/videoadapter.cc b/talk/media/base/videoadapter.cc
index d2b6ca3..20114fb 100644
--- a/talk/media/base/videoadapter.cc
+++ b/talk/media/base/videoadapter.cc
@@ -248,7 +248,8 @@
   ++frames_;
 
   // Update input to actual frame dimensions.
-  VideoFormat format(in_frame->GetWidth(), in_frame->GetHeight(),
+  VideoFormat format(static_cast<int>(in_frame->GetWidth()),
+                     static_cast<int>(in_frame->GetHeight()),
                      input_format_.interval, input_format_.fourcc);
   SetInputFormat(format);