Suppress printing of 'nodes:' and 'scale_factors:' headings when there aren't any in a particular element but there have been some previously, so a group of top level elements may contain 2d and 3d elements.
Suppress printing of 'nodes:' and 'scale_factors:' headings when there aren't
any in a particular element but there have been some previously, so a group of
top level elements may contain 2d and 3d elements.


git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@4383 3c1deb5b-d424-0410-962d-aba41a686d42

hsorby/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc