Fix compilation failure on ia32 and x64.

src/frames.cc

Index: src/frames.cc
diff --git a/src/frames.cc b/src/frames.cc
index bdc76a9bfeb7d9f972f3b1c9a61eabed8003ca1f..16ffbf5a94e61557879fb1a30de550db49c90338 100644
--- a/src/frames.cc
+++ b/src/frames.cc
@@ -554,6 +554,11 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
     parameters_base += safepoint_entry.argument_count();
   }
 
+  if (safepoint_entry.has_doubles()) {
+    parameters_base += DoubleRegister::kNumAllocatableRegisters *
+        kDoubleSize / kPointerSize;
+  }
+
   // Visit the registers that contain pointers if any.
   if (safepoint_entry.HasRegisters()) {
     for (int i = kNumSafepointRegisters - 1; i >=0; i--) {