Add missing SmiUntag for string hash calculation in

in-snapshot code on IA32.
Review URL: https://chromiumcodereview.appspot.com/9254027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10443 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/code-stubs-ia32.cc

@@ -6042,6 +6042,7 @@ void StringHelper::GenerateHashInit(MacroAssembler* masm,
     __ mov(scratch, Operand::StaticArray(scratch,
                                          times_pointer_size,
                                          roots_array_start));
+    __ SmiUntag(scratch);
     __ add(scratch, character);
     __ mov(hash, scratch);
     __ shl(scratch, 10);