Removed multiple inheritance: back to r. 7519 exactly.

FL/Fl_Abstract_Printer.H

FL/Fl_Bitmap.H

FL/Fl_Device.H

FL/Fl_Image.H

FL/Fl_PSfile_Device.H

FL/Fl_Pixmap.H

FL/Fl_Printer.H

src/Fl_Abstract_Printer.cxx

src/Fl_Bitmap.cxx

src/Fl_Device.cxx

src/Fl_Double_Window.cxx

src/Fl_GDI_Printer.cxx

src/Fl_Image.cxx

src/Fl_PS_Printer.cxx

src/Fl_Pixmap.cxx

src/Fl_Printer.cxx

src/Fl_Quartz_Printer.mm

src/Fl_cocoa.mm

src/Fl_win32.cxx

src/Fl_x.cxx