more fixes to compilation warnings from HP-UX build log. About 30% more to go

<sigh>


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5259 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/splitter.cpp

@@ -162,8 +162,8 @@ void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 
 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 {
-    long x = event.GetX();
-    long y = event.GetY();
+    wxCoord x = event.GetX(),
+            y = event.GetY();
 
     // reset the cursor
 #ifdef __WXMOTIF__