message: mwc: clean up members
diff: #include "common.h"
  class MWC64 {
  - uint64_t _x, _c, _t;
  -
  inline void ATTRIBUTE_ALWAYS_INLINE init(uint64_t seed1, uint64_t seed2) {
  _x = seed1;
  _x <<= 32;
  @@ -26,8 +24,11 @@ class MWC64 {
  return _x;
  }
  - int _index;
  + uint64_t _x;
  + uint64_t _c;
  + uint64_t _t;
  uint64_t _value;
  + int _index;
  public:
  MWC64() {
  