Compiling Samba with -O2 flag

[Luke Howard]

>Everything else in Samba beside this problem seems to work fine.
>
>CFLAGS="-O" or GCC<3 with CFLAGS="-O2" solve the problem.
>
>Tested with GCC 3.3.1 and 3.3.3 (SuSE).

See https://bugzilla.samba.org/show_bug.cgi?id=1631


-- Luke