* Printing/GSCUPS/GSCUPSPrinter.h (GSCUPSDummyPrinterName): New
variable.
* Printing/GSCUPS/GSCUPSPrinter.m (GSCUPSDummyPrinterName): New
variable.
(+printerWithName:): Warn and return a dummy printer when requested.
* Printing/GSCUPS/GSCUPSPrintInfo.m (defaultPrinter): If there's
no default CUPS printer set, return a dummy printer.
Fixes bug #10916.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@20542 72102866-910b-0410-8b05-ffd578937521