If tts.getDefaultEngine returns an empty string, then act as if there is no default engine. Similarly, don't try setting an engine if all we get are blank strings.
If tts.getDefaultEngine returns an empty string, then act as if there is no default engine. Similarly, don't try setting an engine if all we get are blank strings.

--HG--
extra : convert_revision : 8e83142a6213fde2c4f4fdcef93d37c9e6371c8b

bramd/spiel,beqabeqa473/Asra,beqabeqa473/Asra,beqabeqa473/Asra,bramd/spiel,bramd/spiel