quagga: Additional centos 6 -enable-werror fixes

This commit fixes these warnings:

1) bgpd/bgp_nexthop.c - dereferencing pointer 'X' does break strict-aliasing rules
2) pimd/pim_igmp_join.c - dereferencing pointer 'X' does break strict-aliasing rules
3) ripd/ripd.c - 'ifaddr.prefixlen' may be used uninitialized in this function

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
3 files changed