[Bug middle-end/54561] incorrect setjmp -Wclobber diagnostics

[mikpelinux at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54561

--- Comment #4 from Mikael Pettersson <mikpelinux at gmail dot com> ---
(In reply to Matthieu Patou from comment #3)
>   volatile proto_tree *tmptree = NULL;

Try

    proto_tree * volatile tmptree = NULL;

It's the variable itself that needs to be volatile, not the memory it points
to.