[rekonq] rekonq + KDE SC 4.5

[Mathias Kraus]

hi,

I found the reason for https://bugs.kde.org/show_bug.cgi?id=245078
bugs.kde.org seems to be down, so I thought I post it here.

the reason for the crash seems to be a bug in qtwebkit.
in Application::updateConfiguration() is setFontFamily(...) called and if the 
string with the font is empty, rekonq will crash on
http://www.pro-linux.de/news/1/15917/opensuse-113-veroeffentlicht.html
the best solution would be, if setFontFamily(...) would check for an empty 
string.
the reason for the empty font string is a rekonq bug. if some certain settings 
are changed, e.g. from the webshortcuts or the cookies, 
AppearanceWidget::save() is called and sets empty font strings because the 
slots AppearanceWidget::slotStandardFont(const QFont &f) and so on are not 
called and therefore reFont[] has empty strings.

hope this helps,
mathias