ping6: do not play dirty tricks with argv

function                                             old     new   delta
common_ping_main                                       -     368    +368
ping6_main                                            30      14     -16
ping_main                                            370      11    -359
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(add/remove: 1/0 grow/shrink: 0/2 up/down: 368/-375)           Total: -7 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed