Review Request: Fix sanitization of dbus path in KMainWindow

[Thomas Lübking]

Am Monday 17 August 2009 schrieb Matthew Woehlke:
> If you'd like to "one-up" my patch, please feel free :-). Otherwise I'm
> not sure what you have in mind.
i guess sth. like

QRegExp identifier("[A-Za-z0-9_]");
o.objectName().mid(i,1).contains(identifier);

Performance ain't crucial here (and QChar::isLetter() just tests some flags), 
but i just tested and QChar grants ::isLetter to really a lot of stuff (esp. 
as any utf-8 char seems to be split an the first part becomes a letter, though 
it's /no/ [A-Za-z] :-(

(new test code attached)
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