cui: GCC 4.6 still doesn't do "override"

But you can use SAL_OVERRIDE instead.

Change-Id: I2697593606ef3ff63f923e364d0ea7e5661b1b3a
Reviewed-on: https://gerrit.libreoffice.org/20297Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 85cabc28)

cui/source/inc/autocdlg.hxx

@@ -187,7 +187,7 @@ class AutoCorrEdit : public Edit
     sal_Int32 m_nCol;
     bool bSpaces;
 
-    void dispose() override;
+    void dispose() SAL_OVERRIDE;
 
 public:
     AutoCorrEdit(vcl::Window* pParent, const ResId& rResId)