add a define for limit macros
add a define for limit macros

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