nullify handle when cs_open() fails. besides, return CS_ERR_ARCH when arch is unsupported
nullify handle when cs_open() fails. besides, return CS_ERR_ARCH when arch is unsupported

nplanel/capstone,dynm/capstone,nplanel/capstone,capturePointer/capstone,nplanel/capstone,8l/capstone,pombredanne/capstone,07151129/capstone,AmesianX/capstone,NeilBryant/capstone,krytarowski/capstone,bughoho/capstone,bowlofstew/capstone,techvoltage/capstone,sigma-random/capstone,krytarowski/capstone,code4bones/capstone,bSr43/capstone,techvoltage/capstone,pyq881120/capstone,pombredanne/capstone,AmesianX/capstone,code4bones/capstone,pranith/capstone,pranith/capstone,xia0pin9/capstone,07151129/capstone,zuloloxi/capstone,nplanel/capstone,angelabier1/capstone,NeilBryant/capstone,bigendiansmalls/capstone,dynm/capstone,dynm/capstone,nplanel/capstone,NeilBryant/capstone,AmesianX/capstone,krytarowski/capstone,xia0pin9/capstone,NeilBryant/capstone,zneak/capstone,bigendiansmalls/capstone,code4bones/capstone,bigendiansmalls/capstone,zuloloxi/capstone,sephiroth99/capstone,zneak/capstone,sigma-random/capstone,bowlofstew/capstone,07151129/capstone,xia0pin9/capstone,xia0pin9/capstone,bigendiansmalls/capstone,zuloloxi/capstone,bigendiansmalls/capstone,techvoltage/capstone,fvrmatteo/capstone,techvoltage/capstone,8l/capstone,pombredanne/capstone,angelabier1/capstone,dynm/capstone,nplanel/capstone,sigma-random/capstone,pyq881120/capstone,angelabier1/capstone,pombredanne/capstone,angelabier1/capstone,8l/capstone,xia0pin9/capstone,zuloloxi/capstone,zneak/capstone,techvoltage/capstone,sigma-random/capstone,angelabier1/capstone,pyq881120/capstone,techvoltage/capstone,pyq881120/capstone,bigendiansmalls/capstone,techvoltage/capstone,bSr43/capstone,bSr43/capstone,bughoho/capstone,pranith/capstone,bSr43/capstone,bSr43/capstone,capturePointer/capstone,krytarowski/capstone,bowlofstew/capstone,sephiroth99/capstone,sigma-random/capstone,zneak/capstone,pranith/capstone,xia0pin9/capstone,pranith/capstone,nplanel/capstone,sephiroth99/capstone,zuloloxi/capstone,bowlofstew/capstone,krytarowski/capstone,capturePointer/capstone,dynm/capstone,8l/capstone,sephiroth99/capstone,zneak/capstone,bowlofstew/capstone,8l/capstone,code4bones/capstone,code4bones/capstone,NeilBryant/capstone,krytarowski/capstone,pyq881120/capstone,07151129/capstone,AmesianX/capstone,AmesianX/capstone,bughoho/capstone,8l/capstone,NeilBryant/capstone,07151129/capstone,sigma-random/capstone,07151129/capstone,fvrmatteo/capstone,xia0pin9/capstone,pombredanne/capstone,pranith/capstone,capturePointer/capstone,sephiroth99/capstone,fvrmatteo/capstone,sephiroth99/capstone,capturePointer/capstone,code4bones/capstone,NeilBryant/capstone,bigendiansmalls/capstone,fvrmatteo/capstone,pyq881120/capstone,zuloloxi/capstone,pyq881120/capstone,zneak/capstone,bughoho/capstone,fvrmatteo/capstone,dynm/capstone,sigma-random/capstone,zneak/capstone,pranith/capstone,bughoho/capstone,pombredanne/capstone,bSr43/capstone,pombredanne/capstone,code4bones/capstone,angelabier1/capstone,krytarowski/capstone,bowlofstew/capstone,07151129/capstone,fvrmatteo/capstone,bSr43/capstone,capturePointer/capstone,AmesianX/capstone,capturePointer/capstone,fvrmatteo/capstone,AmesianX/capstone,8l/capstone,bowlofstew/capstone,bughoho/capstone,zuloloxi/capstone,dynm/capstone,bughoho/capstone,angelabier1/capstone,sephiroth99/capstone