warnings from FreeBSD compilation log removed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6797 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/dragimgg.cpp

@@ -183,7 +183,10 @@ bool wxGenericDragImage::Create(const wxListCtrl& listCtrl, long id)
 }
 
 // Begin drag
-bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
+bool wxGenericDragImage::BeginDrag(const wxPoint& WXUNUSED(hotspot),
+                                   wxWindow* window,
+                                   bool fullScreen,
+                                   wxRect* rect)
 {
     wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));