other/4977: fix-header seg fault with recursive header files

[bangerth@dealii.org]

Synopsis: fix-header seg fault with recursive header files

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Tue Dec 10 16:48:13 2002
State-Changed-Why:
    This report is slightly more than a year old now, and you
    mention some discussion on the gcc mailing list. Do you 
    know whether this has been fixed in the meantime?
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4977