[Bug fortran/56670] Allocatable-length character var causes bogus warning with -Wuninitialized

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56670

--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The dump-tree-original shows

...
    if (name_format != 0B) goto L.1;
    name_format = (character(kind=1)[1:.name_format] *) __builtin_malloc (1);
    goto L.2;
    L.1:;
    if (.name_format == 0) goto L.2;
    name_format = (character(kind=1)[1:.name_format] *) __builtin_realloc
((void *) name_format, 1);
    L.2:;
    .name_format = 0;
...