[QScintilla] Possible bug in qscilexercpp

[Elad Lahav]

If I understand correctly, the only way to determine the list of styles 
supported by a lexer is by calling description() with incrementing style 
numbers, until an empty string is returned.
This method breaks for qscilexercpp, as the UUID style (8) is not 
handled by the description() switch statement. Thus, the complete list 
of styles cannot be obtained.

--Elad