message: Fix compilation bug for other OSes
  Summary: Seems that my comparison was slightly off and dev server compiler let it pass
diff: @@ -350,7 +350,7 @@ void FieldWriteRegs::add_field(DexFieldRef* field,
  // New register
  if (reg_map == previous_usage.regs.end()) {
  previous_usage.regs.insert({reg, {instr}});
  - if (previous_usage.set == OneReg) {
  + if (previous_usage.source == OneReg) {
  m_fields[field] = FieldSet{previous_usage.regs, AllPaths, MultipleReg};
  }
  } else {
  