added: OSG_FWDDECL_FC macro (ticket #234)      : small cleanup/dead code removal
added: OSG_FWDDECL_FC macro (ticket #234)
     : small cleanup/dead code removal

git-svn-id: 6c7e10cdde2c115f53707ba8ec4efe535f92d362@1935 4683daeb-ad0f-0410-a623-93161e962ae5

jondo2010/OpenSG,jondo2010/OpenSG,jondo2010/OpenSG,jondo2010/OpenSG,jondo2010/OpenSG