Minor optimization for initial discovery of vs2017 tools. On my machine, "tundra -t" went from ~8.9 seconds to ~2.9.
Minor optimization for initial discovery of vs2017 tools.
On my machine, "tundra -t" went from ~8.9 seconds to ~2.9.

bmharper/tundra,deplinenoise/tundra,deplinenoise/tundra,deplinenoise/tundra,bmharper/tundra,bmharper/tundra,bmharper/tundra