Fix build with clang 6 and bump PORTREVISION since the code was wrong in any
case

src/dialogs/setupdisplay.cpp:567:41: error: reference to type 'const KFontChooser::DisplayFlags' (aka 'const QFlags<KFontChooser::DisplayFlag>') could not bind to an rvalue of type 'bool'

if ( KFontDialog::getFont( item->font, false, view() ) == QDialog::Accepted ) {
                                       ^~~~~

/usr/local/include/kde4/kfontdialog.h:134:57: note: passing argument to parameter 'flags' here

const KFontChooser::DisplayFlags& flags =
                                  ^

Reported by: pkg-fallout