Addressed build warnings in OICMiddle example.

Addressed build warnings in OICMiddle example.

Fixed OICMiddle compile-time warnings regarding potential use of an
uninitialized variable, as well as an ignored getline() result.

Change-Id: I6ce5a7212ea87cfc506cc97ca97a873c308bf17c
Signed-off-by: Ossama Othman <ossama.othman@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/955
Reviewed-by: John Light <john.j.light@intel.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>