[Bug fortran/69456] Namelist value with trailing sign is ignored without error

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69456

--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on trunk. Will leave open for a bit to see if there is any fallout.