fix for cumulative upcost, extra cost were not being multiplied

[card]
name=Phyrexian Soulgorger
auto=cumulativeupcost[{S(creature|myBattlefield)}] sacrifice
text=Cumulative upkeep - Sacrifice a creature. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
mana={3}
type=Snow Artifact Creature
subtype=Construct
power=8
toughness=8
[/card]
was only charging you 1 sacrifice per upkeep.

added thisTargetComparison, this(cantargetcard(targetchooser))...its a thisdescriptor that compares if the card can be targeted by a target chooser...

projects/mtg/src/MTGAbility.cpp

@@ -2220,7 +2220,6 @@ MTGAbility * AbilityFactory::parseMagicLine(string s, int id, Spell * spell, MTG
             flipStats = splitFlipStat[1];
         }
         MTGAbility * a = NEW AAFlip(observer, id, card, target,flipStats);
-        a->oneShot = 1;
         return a;
     }