unreachable code in brent.c

["Pablo Haramburu" <ph0u@.........>]

Dear developers:

I noticed that there is a short fragment of unreachable code in
min/brent.c (gsl-1.10), function brent_iterate(), lines 197..210. The two
branches of the previous 'if' return, so the code after the 'if' is
unreachable.

I cannot tell if the code is bug-free or not, because I do not understand
the algorithm. I have sent this email in the hope that it is useful, as
unreachable code might point to a bug. If not, it might be a good idea to
remove the unreachable code or add at comment about it.

Sincerely,
Pablo Haramburu