Fixed some warning issued by GCC when compiling f3read.c on 64bits machines.
Nicolai Abruzzese was the first one to report this issue.
The outputs that he obtained were as follows:
f3read.c: In function 'report':
f3read.c:126: warning: format '%llu' expects type 'long long unsigned int', but argument 5 has type 'uint64_t'
f3read.c: In function 'iterate_path':
f3read.c:166: warning: format '%llu' expects type 'long long unsigned int', but argument 2 has type 'uint64_t'
f3read.c:166: warning: format '%llu' expects type 'long long unsigned int', but argument 3 has type 'uint64_t'
f3read.c:166: warning: format '%llu' expects type 'long long unsigned int', but argument 4 has type 'uint64_t'
f3read.c:166: warning: format '%llu' expects type 'long long unsigned int', but argument 5 has type 'uint64_t'