loplugin:useuniqueptr in SwCaptionOptPage

Change-Id: I6e3391be26e6442ab13cc3d6d9da6e6909d68707
Reviewed-on: https://gerrit.libreoffice.org/58228
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/ui/config/optload.cxx

@@ -562,7 +562,7 @@ SwCaptionOptPage::~SwCaptionOptPage()
 void SwCaptionOptPage::dispose()
 {
     DelUserData();
-    delete pMgr;
+    pMgr.reset();
     m_pCheckLB.clear();
     m_pLbCaptionOrder.clear();
     m_pPreview.clear();

sw/source/uibase/inc/optload.hxx

@@ -180,7 +180,7 @@ private:
 
     OUString m_sNone;
 
-    SwFieldMgr* pMgr;
+    std::unique_ptr<SwFieldMgr> pMgr;
     bool bHTMLMode;
 
     TextFilterAutoConvert m_aTextFilter;