[Bug fortran/90536] Use of -fno-range-check creates warnings or errors when assigning to a byte variable

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90536

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
To make the story short: compile your code with -Wno-conversion as a work
around.

This is needed starting with at least 4.6.0 revision r161462 (2010-06-27), but
not needed with 4.5.4 or earlier.

Note that BYTE and '89'X are GNU extensions and not standard conforming.

IMO this PR is INVALID.