Other hot path singleton access

indra/newview/llagentcamera.cpp

indra/newview/llcontrolavatar.cpp

indra/newview/llnetmap.cpp

indra/newview/llselectmgr.cpp

indra/newview/llsurface.cpp

indra/newview/lltoolgun.cpp

indra/newview/llviewermedia.cpp

indra/newview/llviewermessage.cpp

indra/newview/llviewerobject.cpp

indra/newview/llviewerobjectlist.cpp

indra/newview/llviewerregion.cpp

indra/newview/llvoavatar.cpp

indra/newview/llvoavatarself.cpp

indra/newview/llvovolume.cpp