message: Fix Json::Value ambiguity
  Summary:
  Pull Request resolved:
  As always, help pickier compilers.
diff: @@ -916,11 +916,12 @@ void redex_frontend(ConfigFiles& conf, /* input */
  {
  Json::Value d;
  - d["parse_errors"] = parser_stats.parse_errors;
  - d["unknown_tokens"] = parser_stats.unknown_tokens;
  - d["unimplemented"] = parser_stats.unimplemented;
  - d["ok"] = (uint64_t)(pg_config.ok ? 1 : 0);
  - d["blocklisted_rules"] = blocklisted_rules;
  + using u64 = Json::Value::UInt64;
  + d["parse_errors"] = (u64)parser_stats.parse_errors;
  + d["unknown_tokens"] = (u64)parser_stats.unknown_tokens;
  + d["unimplemented"] = (u64)parser_stats.unimplemented;
  + d["ok"] = (u64)(pg_config.ok ? 1 : 0);
  + d["blocklisted_rules"] = (u64)blocklisted_rules;
  stats["proguard"] = d;
  }
  