[Coverity] Uninitialized variable.
[Coverity] Uninitialized variable.

Zero out 'msg' during declaration.

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