Sould not exit textWithParams if locale is not available

[BananaAcid]

https://github.com/javisperez/vuetranslate/blob/master/src/vue-translate.js#L79

Since the input string is used anyways, (return t) the code should not leave, but take t and do the replacing anyways.

[BananaAcid]

would be fixed in pull request #19

[javisperez]

#19 is now merged, thanks for the PR! closing this now.