tdf#89329: use unique_ptr for pImpl in sfxhelp

Change-Id: I357b53f644384452c5dc2b74d3aba3d3dafae00e
Reviewed-on: https://gerrit.libreoffice.org/25314Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

include/sfx2/sfxhelp.hxx

@@ -24,13 +24,14 @@
 #include <sfx2/dllapi.h>
 #include <sal/types.h>
 #include <vcl/help.hxx>
+#include <memory>
 
 class SfxHelp_Impl;
 class SfxFrame;
 class SFX2_DLLPUBLIC SfxHelp : public Help
 {
     bool            bIsDebug;
-    SfxHelp_Impl*   pImp;
+    std::unique_ptr< SfxHelp_Impl >   pImpl;
 
 private:
     SAL_DLLPRIVATE bool Start_Impl( const OUString& rURL, const vcl::Window* pWindow, const OUString& rKeyword );

sfx2/source/appl/sfxhelp.cxx

@@ -218,7 +218,7 @@ OUString SfxHelp_Impl::GetHelpText( const OUString& aCommandURL, const OUString&
 
 SfxHelp::SfxHelp() :
     bIsDebug( false ),
-    pImp    ( nullptr )
+    pImpl( new SfxHelp_Impl )
 {
     // read the environment variable "HELP_DEBUG"
     // if it's set, you will see debug output on active help
@@ -228,13 +228,10 @@ SfxHelp::SfxHelp() :
         osl_getEnvironment( sEnvVarName.pData, &sHelpDebug.pData );
         bIsDebug = !sHelpDebug.isEmpty();
     }
-
-    pImp = new SfxHelp_Impl();
 }
 
 SfxHelp::~SfxHelp()
 {
-    delete pImp;
 }
 
 OUString getDefaultModule_Impl()