message: Place line closer to usage
diff: @@ -294,7 +294,6 @@ namespace vcpkg
  {
  const auto& fs = paths.get_filesystem();
  - const std::vector<std::string> vs2017_installation_instances = get_vs2017_installation_instances(paths);
  // Note: this will contain a mix of vcvarsall.bat locations and dumpbin.exe locations.
  std::vector<fs::path> paths_examined;
  @@ -324,6 +323,8 @@ namespace vcpkg
  }
  }
  + const std::vector<std::string> vs2017_installation_instances = get_vs2017_installation_instances(paths);
  +
  // VS2017
  Optional<Toolset> vs2017_toolset;
  for (const std::string& instance : vs2017_installation_instances)
  