python: fix CS_SKIPDATA_CALLBACK prototype
python: fix CS_SKIPDATA_CALLBACK prototype

pranith/capstone,bSr43/capstone,bSr43/capstone,pranith/capstone,pranith/capstone,pranith/capstone,pranith/capstone,bSr43/capstone,AmesianX/capstone,AmesianX/capstone,bSr43/capstone,pranith/capstone,AmesianX/capstone,AmesianX/capstone,bSr43/capstone,AmesianX/capstone,bSr43/capstone,pranith/capstone,AmesianX/capstone,AmesianX/capstone,bSr43/capstone