fix advanced search location splitting

lib/proptrackr_web/controllers/search_controller.ex

@@ -20,6 +20,7 @@ defmodule PropTrackrWeb.SearchController do
       max_rooms = from(p in Property, select: max(p.room_count)) |> Repo.one
 
       locations = from(p in Property, select: p.location) |> Repo.all
+      locations = locations |> Enum.filter(fn loc -> length(String.split(loc, ",")) >= 2 end)
       cities = Enum.map(locations, fn location -> String.split(location, ",") |> hd |> String.trim() end)
       cities = Enum.uniq(cities)
       countries = Enum.map(locations, fn location -> String.split(location, ",") |> tl |> hd |> String.trim() end)