EXT-7921 FIXED Added a check whether message is what we expecting in LLInventoryAddItemByAssetObserver::changed.
EXT-7921 FIXED Added a check whether message is what we expecting in LLInventoryAddItemByAssetObserver::changed.

Reviewed by Richard Nelson at https://codereview.productengine.com/secondlife/r/618/

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm