Improve output for the case of an Index() that refers to a
Package element that has not been initialized.
Link: https://github.com/acpica/acpica/commit/b01414f5 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>