coverity complains about a null-termination after a read,
so we terminate once we exit the do-while read loop.
Coverity issue: 337680
Fixes: a63504a90f ("examples/power: add JSON string handling")
Cc: stable@dpdk.org
Signed-off-by: David Hunt <david.hunt@intel.com>
Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>