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CF: a bug of cone magic?

When players invoke burning hand to dragon, 
cone of fire would step aside from dragon, since dragon has the
immunity to fire.
But actually, it wouldn't step aside.
I think this is a bug and following patch seems to work well.

*** server/spell_util.c.org	Sun Mar 15 22:02:02 1998
--- server/spell_util.c	Sun Mar 15 22:02:17 1998
***************
*** 825,831 ****
    object *tmp,*head;
    for(tmp=get_map_ob(m,x,y);tmp!=NULL;tmp=tmp->above) {
      head=tmp->head==NULL?tmp:tmp->head;
!     if((QUERY_FLAG(op, FLAG_ALIVE) && head->immune & immune_stop) ||
         (head->stats.maxhp == op->stats.maxhp && head->type == op->type))
        return 0;
    }
--- 825,831 ----
    object *tmp,*head;
    for(tmp=get_map_ob(m,x,y);tmp!=NULL;tmp=tmp->above) {
      head=tmp->head==NULL?tmp:tmp->head;
!     if((QUERY_FLAG(head, FLAG_ALIVE) && head->immune & immune_stop) ||
         (head->stats.maxhp == op->stats.maxhp && head->type == op->type))
        return 0;
    }

Recently, I report same sort of patch for poison attack,
and I found that my patch is not good because of misreading source
code. 
Have I misread source code once again?_? > Peter 

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Seikoh Nishita		      |	Dep't. of Information & Computer Sciences
			      |	Faculty of Engineering Science
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