Routes without way members with empty roles

[Nakaner]

If you route only has no way members which have an empty role (i.e. route with forward, backward or both roles but valid stops and platforms), the error message reads like "route has only stops/platforms" but that is wrong. The error message should be rephrased.

[mfrasca]

possibly a silly question, but does this still apply? the roles forward, backward or both were in PTv1, weren't they? and this validator only checks PTv2.

[mfrasca]

mfrasca@0494880