Merge #13776: net: Add missing verification of IPv6 address in CNetAddr::GetIn6Addr(...)

2fb0066b99 net: Add missing verification of IPv6 address in CNetAddr::GetIn6Addr(...) (practicalswift)

Pull request description:

  Add missing verification of IPv6 address in `CNetAddr::GetIn6Addr(...)`.

Tree-SHA512: 8b0681252eec9cf293a2043e99fdacec520e321b477d8aca1cbd6327b85bf6c5e8cd820fb914f097c62655947e88745ebccd824a78b995a8186e910e6fe520aa

src/netaddress.cpp

@@ -300,6 +300,9 @@ bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
 
 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
 {
+    if (!IsIPv6()) {
+        return false;
+    }
     memcpy(pipv6Addr, ip, 16);
     return true;
 }