use unique_ptr for memory owning ptr

Change-Id: I26efcebf750ff9947b936e990ce87ddbcb41b7ba

sc/inc/textuno.hxx

@@ -33,6 +33,8 @@
 #include <rtl/ref.hxx>
 #include "scdllapi.h"
 
+#include <memory>
+
 #include <boost/noncopyable.hpp>
 
 class EditEngine;
@@ -111,7 +113,7 @@ public:
 class ScHeaderFooterTextData : private boost::noncopyable
 {
 private:
-    EditTextObject* mpTextObj;
+    std::unique_ptr<EditTextObject> mpTextObj;
     rtl::Reference<ScHeaderFooterContentObj> rContentObj;
     sal_uInt16                      nPart;
     ScEditEngineDefaulter*      pEditEngine;
@@ -132,7 +134,7 @@ public:
     sal_uInt16                  GetPart() const         { return nPart; }
     rtl::Reference<ScHeaderFooterContentObj> GetContentObj() const { return rContentObj; }
 
-    const EditTextObject* GetTextObject() const { return mpTextObj; }
+    const EditTextObject* GetTextObject() const { return mpTextObj.get(); }
 
     void dispose() { rContentObj.clear(); }
 };

sc/source/ui/unoobj/textuno.cxx

@@ -198,7 +198,6 @@ ScHeaderFooterTextData::~ScHeaderFooterTextData()
 
     delete pForwarder;
     delete pEditEngine;
-    delete mpTextObj;
 }
 
 SvxTextForwarder* ScHeaderFooterTextData::GetTextForwarder()
@@ -247,15 +246,13 @@ void ScHeaderFooterTextData::UpdateData()
 {
     if (pEditEngine)
     {
-        delete mpTextObj;
-        mpTextObj = pEditEngine->CreateTextObject();
+        mpTextObj.reset(pEditEngine->CreateTextObject());
     }
 }
 
 void ScHeaderFooterTextData::UpdateData(EditEngine& rEditEngine)
 {
-    delete mpTextObj;
-    mpTextObj = rEditEngine.CreateTextObject();
+    mpTextObj.reset(rEditEngine.CreateTextObject());
     bDataValid = false;
 }