ping: always initialize ->sin6_scope_id and ->sin6_flowinfo

If we don't need scope id, we should initialize it to zero.
Same for ->sin6_flowinfo.

CRs-Fixed: 619776
Change-Id: Ic19792cee3f5dc30237562cf48e6bdf49817c96e
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: c26d6b46da3ee86fa8a864347331e5513ca84c2b
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>