Don't load reference info if RefId == -1, Reference::Read (TangramDetect/TGM_Reference.cpp).
Don't load reference info if RefId == -1, Reference::Read (TangramDetect/TGM_Reference.cpp).

jiantao/Tangram,jiantao/Tangram,jiantao/Tangram,jiantao/Tangram,jiantao/Tangram