5088 it's probably ok for vi to stop working around pdp-11 bugs now

*** 922,957 ****
          if (addr != dot && addr >= one && addr <= dol)
                  markDOT();
  }
  
  /*
-  * The following code is defensive programming against a bug in the
-  * pdp-11 overlay implementation.  Sometimes it goes nuts and asks
-  * for an overlay with some garbage number, which generates an emt
-  * trap.  This is a less than elegant solution, but it is somewhat
-  * better than core dumping and losing your work, leaving your tty
-  * in a weird state, etc.
-  */
- int _ovno;
- 
- /*ARGSUSED*/
- void 
- onemt(sig)
- int sig;
- {
-         int oovno;
- 
-         signal(SIGEMT, onemt);
-         oovno = _ovno;
-         /* 2 and 3 are valid on 11/40 type vi, so */
-         if (_ovno < 0 || _ovno > 3)
-                 _ovno = 0;
-         error(value(vi_TERSE) ? gettext("emt trap, _ovno is %d ") :
- gettext("emt trap, _ovno is %d   - try again"));
- }
- 
- /*
   * When a hangup occurs our actions are similar to a preserve
   * command.  If the buffer has not been [Modified], then we do
   * nothing but remove the temporary files and exit.
   * Otherwise, we sync the temp file and then attempt a preserve.
   * If the preserve succeeds, we unlink our temp files.
--- 922,931 ----