[components][netdev] fix divide-by-zero in ping statistics when no reply

netdev_cmd_ping() computed avg_time / received before checking that any
reply arrived. When every request times out, received is 0 and the
integer division traps (SIGFPE on the simulator, a fault on Cortex-M),
taking the shell thread down. Only compute the average inside the
existing received > 0 branch where it is printed.

Fixes #11852

0 files changed, 0 insertions, 0 deletions