Fixed a problem with the Load operator where an exception was not
returned in the case where the table is already loaded.

http://www.acpica.org/bugzilla/show_bug.cgi?id=463Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: NLen Brown <len.brown@intel.com>