added client routine

widget/src/mac/nsWindow.cpp

@@ -178,6 +178,7 @@ nsWindow::nsWindow(nsISupports *aOuter):
   mDisplayed = PR_FALSE;
   mLowerLeft = PR_FALSE;
   mCursor = eCursor_standard;
+  mClientData = nsnull;
 }
 
 
@@ -392,6 +393,23 @@ void nsWindow::Destroy()
 {
 }
 
+//-------------------------------------------------------------------------
+//
+// Accessor functions to get/set the client data
+//
+//-------------------------------------------------------------------------
+
+NS_IMETHODIMP nsWindow::GetClientData(void*& aClientData)
+{
+  aClientData = mClientData;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsWindow::SetClientData(void* aClientData)
+{
+  mClientData = aClientData;
+  return NS_OK;
+}
 
 //-------------------------------------------------------------------------
 //