bugfixes in new GETMANT* instrs

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12165 6c8e4198-a580-4521-a02f-c9ae86df1db9
fixed gcc warning

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12166 6c8e4198-a580-4521-a02f-c9ae86df1db9