Fixed Bug 7949

Issue with combos reapplying themselves upon removal of a duplicate item present (e.g. 2x gloves of a glove that combos with a shield), since 524291493e64
Thanks to Angelmelody
http://hercules.ws/board/tracker/issue-7949-item-combo-bug/

Signed-off-by: shennetsind <ind@henn.et>