Fix stringification of bitfields with duplicate values
Fix stringification of bitfields with duplicate values

* We'd previously subtract the bitfield value twice, leading to underflow and
  then lots of unknown bits appear to be set. Instead we should clear the bit so
  that it's safe to apply multiple times.

Zorro666/renderdoc,googlestadia/renderdoc,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc