Fix bug in test on Windows.

test/cctest/test-log-stack-tracer.cc

Index: test/cctest/test-log-stack-tracer.cc
diff --git a/test/cctest/test-log-stack-tracer.cc b/test/cctest/test-log-stack-tracer.cc
index 9905db82d8ef0fb7489568bcdb654f7b83b1c1ba..dadf7b9a3e1474fd45e042071297c0626d417bab 100644
--- a/test/cctest/test-log-stack-tracer.cc
+++ b/test/cctest/test-log-stack-tracer.cc
@@ -336,7 +336,7 @@ static void CFuncDoTrace(byte dummy_parameter) {
 #elif defined _MSC_VER
   // Approximate a frame pointer address. We compile without base pointers,
   // so we can't trust ebp/rbp.
-  fp = &dummy_parameter - 2 * kPointerSize;
+  fp = &dummy_parameter - 2 * sizeof(&dummy_parameter);
 #else
 #error Unexpected platform.
 #endif