added wxSocket::ShutdownOutput() (closes #9229)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57656 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/socket.cpp

@@ -770,14 +770,19 @@ bool wxSocketBase::Close()
     // Interrupt pending waits
     InterruptWait();
 
-    if (m_impl)
-        m_impl->Shutdown();
+    ShutdownOutput();
 
     m_connected = false;
     m_establishing = false;
     return true;
 }
 
+void wxSocketBase::ShutdownOutput()
+{
+    if ( m_impl )
+        m_impl->Shutdown();
+}
+
 wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes)
 {
     // Mask read events