*** main.c.orig	Mon Oct 19 11:29:04 1992
--- main.c	Mon Jan  2 15:33:39 1995
***************
*** 121,126 ****
--- 121,132 ----
    display = XtOpenDisplay( context, NULL, NULL, "Xtetris", Options, XtNumber(Options),
  		&argc, argv );
  
+   if (display == NULL) {
+      fprintf(stderr, "%s : Cannot connect to X Server %s\n", argv[0],
+              XDisplayName(NULL));
+      exit(1);
+   }
+ 
    /* Get a default customization. */
  
    screenno = DefaultScreen(display);