Fix failed startup in pgtk mode without display #1
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* src/dispnew.c (init_display_interactive): In pgtk mode, inhibit window system, when both DISPLAY and WAYLAND_DISPLAY are unset * src/emacs.c (main): Also defined and allow to set display_arg in pgtk mode
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With the pgtk branch, when neither a Wayland display or a X11 display are available nor
-nwis given, emacs startup fails with(emacs:2980530): Gtk-WARNING **: 11:18:31.402: cannot open display:I believe the display initialization for pgtk should (just as for X11) check whether a display is specified via env or
-d