loplugin:useuniqueptr in SwSpellDialogChildWindow

Change-Id: Ib79e4672b7857aaacef15cd55c8633523df4d26b
Reviewed-on: https://gerrit.libreoffice.org/57877
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/uibase/dialog/SwSpellDialogChildWindow.cxx

@@ -160,7 +160,7 @@ SwSpellDialogChildWindow::~SwSpellDialogChildWindow ()
     SwWrtShell* pWrtShell = GetWrtShell_Impl();
     if(!m_pSpellState->m_bInitialCall && pWrtShell)
         pWrtShell->SpellEnd();
-    delete m_pSpellState;
+    m_pSpellState.reset();
 }
 
 SfxChildWinInfo SwSpellDialogChildWindow::GetInfo() const

sw/source/uibase/inc/SwSpellDialogChildWindow.hxx

@@ -29,7 +29,7 @@ class SwSpellDialogChildWindow
     : public svx::SpellDialogChildWindow
 {
     bool            m_bIsGrammarCheckingOn;
-    SpellState*     m_pSpellState;
+    std::unique_ptr<SpellState> m_pSpellState;
 
     SwWrtShell*     GetWrtShell_Impl();
     bool            MakeTextSelection_Impl(SwWrtShell& rSh, ShellMode eSelMode);