optimization/3846: With -O, -Wall flags unreachable code when it should not

[bangerth@dealii.org]

Synopsis: With -O, -Wall flags unreachable code when it should not

State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Sat Mar 22 17:25:41 2003
State-Changed-Why:
    This has been fixed long ago.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=3846