message: Fix unused lambda capture compile warning
diff: @@ -1340,8 +1340,7 @@ void Debugger::ApplyDebugSourceVars(size_t startOffs, ThreadState &thread, Shade
  func = func->parent;
  rdcarray<LocalMapping> sorted = m_DebugInfo.activeLocalMappings;
  - std::sort(sorted.begin(), sorted.end(),
  - [this, &thread](const LocalMapping &a, const LocalMapping &b) {
  + std::sort(sorted.begin(), sorted.end(), [&thread](const LocalMapping &a, const LocalMapping &b) {
  size_t aStep = a.stepIndex;
  size_t bStep = b.stepIndex;
  