fix signature of wxClipboard::UserPrimarySelection; in particular change the default value from true to false since in the real sources the default value has always been the latter

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55816 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/clipbrd.h

@@ -173,6 +173,6 @@ public:
         normal clipboard contents with the currently selected text on the other
         platforms.
     */
-    void UsePrimarySelection(bool primary = true);
+    virtual void UsePrimarySelection(bool primary = false);
 };