FreeSWITCH

Merge pull request #1711 in FS/freeswitch from ~SEBASTIAN/freeswitch:bugfix/FS-11783-address-gcc8-warnings to master

* commit '3ca75eb8efa4e50ebe083a269b75fcb1762daa91':
  FS-11783: [mod_say_ja] quiet overflow warning
  FS-11783: [core] quiet gcc truncation warning