merge -r 56738:56842 maintenance.

indra/llcharacter/llkeyframemotion.cpp

indra/llcharacter/llmultigesture.cpp

indra/llmessage/lldatapacker.cpp

indra/llmessage/lldatapacker.h

indra/llmessage/lltransfersourcefile.cpp

indra/lscript/lscript_alloc.h

indra/lscript/lscript_library/lscript_library.cpp

indra/newview/lltexlayer.cpp

indra/newview/llviewermenu.cpp

indra/newview/llviewerobject.cpp

indra/newview/llviewerobject.h

indra/newview/llvlcomposition.cpp

indra/newview/llvlcomposition.h