gui-fatal: do not run as root

GTK+ refuses to initialize.

qubes-rpc/gui-fatal.c

@@ -28,6 +28,8 @@ static void produce_message(const char * type, const char *fmt, va_list args)
 	case -1:
 		exit(1);	//what else
 	case 0:
+		if (geteuid() == 0)
+			setuid(getuid());
 		fix_display();
 #ifdef USE_KDIALOG
 		execlp("/usr/bin/kdialog", "kdialog", "--sorry", dialog_msg, NULL);