Fix Win64. It still cares about the actual registers behind scratch1/scratch2

Review URL: https://chromiumcodereview.appspot.com/12211011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13595 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/stub-cache-x64.cc

@@ -2839,7 +2839,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(
 
 Register* LoadStubCompiler::registers() {
   // receiver, name, scratch1, scratch2, scratch3, scratch4.
-  static Register registers[] = { rax, rcx, rbx, rdx, rdi, r8 };
+  static Register registers[] = { rax, rcx, rdx, rbx, rdi, r8 };
   return registers;
 }