src/json.c: Put comment about compiler warnings on signed/unsigned comparison, which are safe in my case
src/json.c: Put comment about compiler warnings on signed/unsigned comparison, which are safe in my case

jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF,jddurand/c-marpaESLIF