Replace some C cast by C++ const_cast to make things a bit more pure and clearer...
Replace some C cast by C++ const_cast to make things a bit more pure and clearer...

freedesktop-unofficial-mirror/beignet,freedesktop-unofficial-mirror/beignet,ignatenkobrain/beignet,wdv4758h/beignet,zhenyw/beignet,ignatenkobrain/beignet,wdv4758h/beignet,freedesktop-unofficial-mirror/beignet,zhenyw/beignet,ignatenkobrain/beignet,wdv4758h/beignet,zhenyw/beignet,wdv4758h/beignet,freedesktop-unofficial-mirror/beignet,ignatenkobrain/beignet,ignatenkobrain/beignet,wdv4758h/beignet,zhenyw/beignet,zhenyw/beignet