calc: double dispose issue.

Change-Id: Ic8cc713ef2c7ec77d5418df5b5b689406641b037
diff --git a/sc/source/ui/app/inputwin.cxx b/sc/source/ui/app/inputwin.cxx
index 4e32f8c..f04a482 100644
--- a/sc/source/ui/app/inputwin.cxx
+++ b/sc/source/ui/app/inputwin.cxx
@@ -1508,7 +1508,10 @@ void ScTextWnd::dispose()
        maAccTextDatas.back()->Dispose();
    }
    delete pEditView;
    pEditView = NULL;
    delete pEditEngine;
    pEditEngine = NULL;

    ScTextWndBase::dispose();
}