Check routing matches for emptiness more precisely since Merb::Router…

….match definitely allows [nil, non-empty-hash] result

lib/merb-core/test/helpers/request_helper.rb

@@ -300,7 +300,7 @@ def dispatch_request(request, controller_klass, action, &blk)
       # Hash:: The parameters built based on the matching route.
       def check_request_for_route(request)
         match =  ::Merb::Router.match(request)
-        if match[0].nil?
+        if match[0].nil? && match[1].empty?
           raise ::Merb::ControllerExceptions::BadRequest, "No routes match the request"
         else
           match[1]