loplugin:useuniqueptr in MasterPageDescriptor

Change-Id: I54d46aeec5f74ccf088ea33d03fd1d8a2009d43f
Reviewed-on: https://gerrit.libreoffice.org/49211Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svx/sdrmasterpagedescriptor.hxx

@@ -22,6 +22,7 @@
 
 #include <svx/sdrpageuser.hxx>
 #include <svx/svdsob.hxx>
+#include <memory>
 
 class SdrObject;
 class SfxItemSet;
@@ -45,7 +46,7 @@ namespace sdr
         SdrLayerIDSet                                       maVisibleLayers;
 
         // ViewContact part
-        sdr::contact::ViewContact*                      mpViewContact;
+        mutable std::unique_ptr<sdr::contact::ViewContact>      mpViewContact;
 
         void operator=(const MasterPageDescriptor& rCandidate) = delete;
 

svx/source/svdraw/sdrmasterpagedescriptor.cxx

@@ -45,11 +45,7 @@ namespace sdr
         // de-register at used page
         maUsedPage.RemovePageUser(*this);
 
-        if(mpViewContact)
-        {
-            delete mpViewContact;
-            mpViewContact = nullptr;
-        }
+        mpViewContact.reset();
     }
 
     // ViewContact part
@@ -57,8 +53,8 @@ namespace sdr
     {
         if(!mpViewContact)
         {
-            const_cast< MasterPageDescriptor* >(this)->mpViewContact =
-                new sdr::contact::ViewContactOfMasterPageDescriptor(*const_cast< MasterPageDescriptor* >(this));
+            mpViewContact.reset(
+                new sdr::contact::ViewContactOfMasterPageDescriptor(*const_cast< MasterPageDescriptor* >(this)) );
         }
 
         return *mpViewContact;