two bugfixes:
two bugfixes:

- when invoking `parseError` ALWAYS ensure that the current lexer instance is referenced by its `this` -- also when we happen to 're-use' the `parseError` function provided by the **parser**!

- when the lexer `parseError` would fall back to throwing an exception by itself, it must include the provided `hash` info object with the exception!

GerHobbelt/jison-lex,GerHobbelt/jison-lex