Some more fortran safe-ctype & cleanups

[Neil Booth]

Kaveh R. Ghazi wrote:-

> One note, there was no direct equivalent to is_hor_space in
> safe-ctype, so it became ISSPACE && != '\n'.

is_nvspace exists for this case ("is a non-vertical space").  Maybe
the Fortran front end doesn't handle the CR-LF etc. dilemma properly
at the moment; I know Java, C, ObjC and C++ do.

is_nvspace() is what cpplib uses.

Neil.