loplugin:useuniqueptr in SdrCreateView

Change-Id: I41f3441593afa1884d5e8cda4126e97b545fd0a8
Reviewed-on: https://gerrit.libreoffice.org/53750Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svx/svdcrtv.hxx

@@ -22,6 +22,7 @@
 
 #include <svx/svddrgv.hxx>
 #include <svx/svxdllapi.h>
+#include <memory>
 
 class XLineAttrSetItem;
 class XFillAttrSetItem;
@@ -38,7 +39,7 @@ class SVX_DLLPUBLIC SdrCreateView : public SdrDragView
 protected:
     SdrObject*                  pCurrentCreate;   // The currently being created object
     SdrPageView*                pCreatePV;    // Here, the creation is started
-    ImplConnectMarkerOverlay*   mpCoMaOverlay;
+    std::unique_ptr<ImplConnectMarkerOverlay> mpCoMaOverlay;
 
     // for migrating stuff from XOR, use ImpSdrCreateViewExtraData ATM to not need to
     // compile the apps all the time

svx/source/svdraw/svdcrtv.cxx

@@ -175,11 +175,7 @@ void ImpSdrCreateViewExtraData::HideOverlay()
 
 void SdrCreateView::ImpClearConnectMarker()
 {
-    if(mpCoMaOverlay)
-    {
-        delete mpCoMaOverlay;
-        mpCoMaOverlay = nullptr;
-    }
+    mpCoMaOverlay.reset();
 }
 
 void SdrCreateView::ImpClearVars()
@@ -201,7 +197,6 @@ SdrCreateView::SdrCreateView(
     SdrModel& rSdrModel,
     OutputDevice* pOut)
 :   SdrDragView(rSdrModel, pOut),
-    mpCoMaOverlay(nullptr),
     mpCreateViewExtraData(new ImpSdrCreateViewExtraData())
 {
     ImpClearVars();
@@ -295,7 +290,7 @@ void SdrCreateView::SetConnectMarker(const SdrObjConnection& rCon)
 
         if(!mpCoMaOverlay)
         {
-            mpCoMaOverlay = new ImplConnectMarkerOverlay(*this, *pTargetObject);
+            mpCoMaOverlay.reset(new ImplConnectMarkerOverlay(*this, *pTargetObject));
         }
     }
     else