Fix segfault in 1992/westley without enough args

1992/westley/westley.c

@@ -1,7 +1,7 @@
            main(l
    ,a)char**a;{int n;int d;
-  for(d=atoi(a[1])/10*80-
- atoi(a[2])/5-596;n="@NKA\
+ if (l>2)for(d=atoi(a[1])/10
+ *80-atoi(a[2])/5-596;n="@NKA\
 CLCCGZAAQBEAADAFaISADJABBA^\
 SNLGAQABDAXIMBAACTBATAHDBAN\
 ZcEMMCCCCAAhEIJFAEAAABAfHJE\