changed some conditionals to give osg 2.8.3 compatibility
changed some conditionals to give osg 2.8.3 compatibility

--HG--
extra : convert_revision : svn%3A9ea0355d-b33e-0410-9de5-817935624dc7/trunk%40226

cmbruns/osgswig,cmbruns/osgswig,cmbruns/osgswig,cmbruns/osgswig,cmbruns/osgswig