asan: buffer overflow in vms-alpha.c

* vms-alpha.c (evax_bfd_print_dst): Sanity check another place
	printing strings.

bfd/vms-alpha.c

@@ -7390,7 +7390,9 @@ evax_bfd_print_dst (struct bfd *abfd, unsigned int dst_size, FILE *file)
 	  fprintf (file, _("standard data: %s\n"),
 		   evax_bfd_get_dsc_name (type));
 	  evax_bfd_print_valspec (buf, len, 4, file);
-	  fprintf (file, _("    name: %.*s\n"), buf[5], buf + 6);
+	  if (len > 6)
+	    fprintf (file, _("    name: %.*s\n"),
+		     buf[5] > len - 6 ? len - 6 : buf[5], buf + 6);
 	  break;
 	case DST__K_MODBEG:
 	  {