Fix scale.cc build error with mingw64 -m32 gcc

BUG=571
TESTED=gcc scale.cc
R=wjia@chromium.org

Review URL: https://codereview.chromium.org/16361008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204025 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -282,7 +282,7 @@ deps = {
         "/trunk/jsoncpp/src/lib_json@" + Var("jsoncpp_revision"),
 
   "src/third_party/libyuv":
-    (Var("googlecode_url") % "libyuv") + "/trunk@715",
+    (Var("googlecode_url") % "libyuv") + "/trunk@717",
 
   "src/third_party/smhasher/src":
     (Var("googlecode_url") % "smhasher") + "/trunk@149",