initialize the local address before calling getsockname() on it (closes #10779)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60567 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/socket.cpp

@@ -364,6 +364,14 @@ void wxSocketImpl::PostCreation()
 
 wxSocketError wxSocketImpl::UpdateLocalAddress()
 {
+    if ( !m_local.IsOk() )
+    {
+        // ensure that we have a valid object using the correct family: correct
+        // being the same one as our peer uses as we have no other way to
+        // determine it
+        m_local.Create(m_peer.GetFamily());
+    }
+
     WX_SOCKLEN_T lenAddr = m_local.GetLen();
     if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 )
     {