Avoid more unnecessary copying

indra/llappearance/llavatarappearance.cpp

indra/llappearance/llavatarappearancedefines.cpp

indra/llappearance/llavatarappearancedefines.h

indra/llappearance/llpolymorph.cpp

indra/llappearance/llpolymorph.h

indra/llappearance/llwearabletype.cpp

indra/llaudio/llaudiodecodemgr.cpp

indra/llaudio/llaudioengine_fmodstudio.cpp

indra/llaudio/llaudioengine_fmodstudio.h

indra/llcharacter/llgesture.cpp

indra/llcharacter/llgesture.h

indra/llcommon/llapr.cpp

indra/llcommon/llapr.h

indra/llcommon/llcallstack.h

indra/llcommon/llcommonprecompiled.h

indra/llcommon/llcoros.cpp

indra/llcommon/llcoros.h

indra/llcommon/lldictionary.cpp

indra/llcommon/lldictionary.h

indra/llcommon/llevent.h