message: Fix a problem copying stale reference when adding history modifications
diff: @@ -3947,9 +3947,13 @@ rdcarray<PixelModification> VulkanReplay::PixelHistory(rdcarray<EventUsage> even
  eventPremods[mod.eventId] = mod.preMod;
  }
  + if(frags > 1)
  + {
  + PixelModification duplicate = mod;
  for(int32_t f = 1; f < frags; f++)
  {
  - history.insert(h + 1, mod);
  + history.insert(h + 1, duplicate);
  + }
  }
  for(int32_t f = 0; f < frags; f++)
  history[h + f].fragIndex = f;
  