[Bug fortran/87851] [8/9/10 Regression] Wrong return type for len_trim

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87851

--- Comment #10 from anlauf at gcc dot gnu.org ---
Forget comment#8 and comment#9.  The standard declares the default kind
of LEN_TRIM to be that of default integer.