Skip POINTOPOINT of IPv4 too instead of IPv6 only

Fix following error on `utun*`:
```
  1) Error:
TestSocket#test_udp_server:
Errno::ECONNREFUSED: Connection refused - recvmsg(2)
```

1 files changed, 4 insertions, 5 deletions

diff --git a/test/socket/test_socket.rb b/test/socket/test_socket.rb
index 6cbf3edca8..381b0385e5 100644
--- a/test/socket/test_socket.rb
+++ b/test/socket/test_socket.rb
@@ -380,11 +380,10 @@ class TestSocket < Test::Unit::TestCase
             in6_ifreq = [ifr_name,ai.to_sockaddr].pack('a16A*')
             s.ioctl(ulSIOCGIFFLAGS, in6_ifreq)
             next true if in6_ifreq.unpack('A16L1').last & ulIFF_POINTOPOINT != 0
-          else
-            ifconfig ||= `/sbin/ifconfig`
-            next true if ifconfig.scan(/^(\w+):(.*(?:\n\t.*)*)/).find do|ifname, value|
-              value.include?(ai.ip_address) && value.include?('POINTOPOINT')
-            end
+          end
+          ifconfig ||= `/sbin/ifconfig`
+          next true if ifconfig.scan(/^(\w+):(.*(?:\n\t.*)*)/).find do |_ifname, value|
+            value.include?(ai.ip_address) && value.include?('POINTOPOINT')
           end
         end
         false