x86: fix issue #458 reported by Ruslan Kabatsayev
x86: fix issue #458 reported by Ruslan Kabatsayev

AmesianX/capstone,bSr43/capstone,pombredanne/capstone,angelabier1/capstone,code4bones/capstone,AmesianX/capstone,pranith/capstone,bughoho/capstone,pombredanne/capstone,code4bones/capstone,07151129/capstone,dynm/capstone,bigendiansmalls/capstone,capturePointer/capstone,angelabier1/capstone,bigendiansmalls/capstone,angelabier1/capstone,bigendiansmalls/capstone,bSr43/capstone,bSr43/capstone,bigendiansmalls/capstone,AmesianX/capstone,AmesianX/capstone,07151129/capstone,capturePointer/capstone,dynm/capstone,bughoho/capstone,pombredanne/capstone,angelabier1/capstone,bughoho/capstone,pombredanne/capstone,bigendiansmalls/capstone,dynm/capstone,AmesianX/capstone,pranith/capstone,dynm/capstone,capturePointer/capstone,capturePointer/capstone,bigendiansmalls/capstone,pombredanne/capstone,angelabier1/capstone,code4bones/capstone,bSr43/capstone,07151129/capstone,capturePointer/capstone,bughoho/capstone,AmesianX/capstone,dynm/capstone,pranith/capstone,pranith/capstone,angelabier1/capstone,bughoho/capstone,07151129/capstone,code4bones/capstone,code4bones/capstone,AmesianX/capstone,code4bones/capstone,bSr43/capstone,bughoho/capstone,07151129/capstone,pranith/capstone,pranith/capstone,capturePointer/capstone,bSr43/capstone,dynm/capstone,capturePointer/capstone,bughoho/capstone,pombredanne/capstone,bSr43/capstone,angelabier1/capstone,bigendiansmalls/capstone,pombredanne/capstone,07151129/capstone,dynm/capstone,code4bones/capstone,pranith/capstone,07151129/capstone