Fix wall clock in bench system timer on Windows.


git-svn-id: http://skia.googlecode.com/svn/trunk@2503 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/BenchSysTimer_windows.cpp b/bench/BenchSysTimer_windows.cpp
index e51d346..3635ec5 100644
--- a/bench/BenchSysTimer_windows.cpp
+++ b/bench/BenchSysTimer_windows.cpp
@@ -58,6 +58,7 @@
         return 0.0L;
     } else {
         return static_cast<double>(ticks_elapsed.QuadPart)
-            /  static_cast<double>(frequency.QuadPart * 1000);
+             / static_cast<double>(frequency.QuadPart)
+             * 1000.0L;
     }
 }