Fix issue 417: incorrect %t placeholder expansion.

BUG=http://code.google.com/p/v8/issues/detail?id=417
TEST=none

Verified on Linux, Mac, and Windows.

Review URL: http://codereview.chromium.org/160636

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2625 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/log.cc

@@ -1151,8 +1151,8 @@ bool Logger::Setup() {
               break;
             case 't': {
               // %t expands to the current time in milliseconds.
-              uint32_t time = static_cast<uint32_t>(OS::TimeCurrentMillis());
-              stream.Add("%u", time);
+              double time = OS::TimeCurrentMillis();
+              stream.Add("%.0f", FmtElm(time));
               break;
             }
             case '%':