Fix crash when hit with an arrow that is not piercing
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@ -268,7 +268,7 @@ local arrow_entity = {
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local hook = item_def and item_def._on_collide_with_entity
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if hook then hook(self, pos, obj) end
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if self._piercing > 0 then
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if (self._piercing or 0) > 0 then
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self._piercing = self._piercing - 1
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return
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end
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