cppCheck RedundantAssignment variable p3DObj

Change-Id: Ib423480bdb5d2cee183b5d1bda5b1a9ff05fdafc
Reviewed-on: https://gerrit.libreoffice.org/62667Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

sd/source/ui/func/fucon3d.cxx

@@ -328,11 +328,9 @@ bool FuConstruct3dObject::MouseButtonDown(const MouseEvent& rMEvt)
         mpWindow->CaptureMouse();
         sal_uInt16 nDrgLog = sal_uInt16 ( mpWindow->PixelToLogic(Size(DRGPIX,0)).Width() );
 
-        E3dCompoundObject* p3DObj = nullptr;
-
         WaitObject aWait( static_cast<vcl::Window*>(mpViewShell->GetActiveWindow()) );
 
-        p3DObj = ImpCreateBasic3DShape();
+        E3dCompoundObject* p3DObj = ImpCreateBasic3DShape();
         E3dScene* pScene = mpView->SetCurrent3DObj(p3DObj);
 
         ImpPrepareBasic3DShape(p3DObj, pScene);