Fix a build issue on 32bit
Fix a build issue on 32bit

acleasby/lnav,tstack/lnav,tstack/lnav,sureshsundriyal/lnav,sureshsundriyal/lnav,sureshsundriyal/lnav,tstack/lnav,sureshsundriyal/lnav,tstack/lnav,acleasby/lnav,acleasby/lnav,acleasby/lnav,acleasby/lnav