Finding an affect by name and stopping it.

[Mervine, Keith]

Greetings,
        I'm not sure if this has been done before, but I'm trying to let
players stop affects on themselves by issusing a command.

What I have so far(from looking at other code) doesn't appear to work.
Can someone take a look at it and advise me please?

The syntax would be something like "stop displacement"

Thanks!
-K

void do_stop( CHAR_DATA *ch, char *argument )
{
 char arg[MAX_INPUT_LENGTH];
 AFFECT_DATA *paf, *paf_last = NULL;
 char buf[MAX_STRING_LENGTH];
 int sn;

   argument = one_argument( argument, arg );

   if ( arg[0] == '\0' )
   {
    if ( ch->affected != NULL )
    {
     send_to_char( "You are maintaining the following psi powers:\n\r",
ch );
     for ( paf = ch->affected; paf != NULL; paf = paf->next )
     {
      if (skill_table[paf->type].group == GROUP_PSI)
      {
       sprintf( buf, "@[EMAIL PROTECTED]
%d/tick\n\r",skill_table[paf->type].name,skill_table[paf->type].min_mana
);
       send_to_char( buf,ch );
       paf_last = paf;
      }
     }
    }
    else
    {
     send_to_char("You are not maintaining any psi powers.\n\r",ch);
    }
    return;
   }

   if ( sn = find_spell( ch,arg ) < 0 )
    {
        send_to_char( "You don't of know any powers by that name.\n\r",
ch );
        return;
    }

   if (is_affected(ch,sn))
   {
    affect_strip(ch,sn);
    if ( skill_table[sn].msg_off )
    {
     send_to_char( skill_table[sn].msg_off, ch );
     send_to_char( "\n\r", ch );
    }
    return;
   }
}