loplugin:useuniqueptr in SdPPTImport

Change-Id: I843a2626c6351789bee3d68f0ab9debca9caa733
Reviewed-on: https://gerrit.libreoffice.org/62663
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sd/source/filter/ppt/pptin.cxx

@@ -137,11 +137,11 @@ SdPPTImport::SdPPTImport( SdDrawDocument* pDocument, SvStream& rDocStream, SotSt
     pSummaryInformation.reset();
 #endif
 
-    SvStream* pCurrentUserStream = rStorage.OpenSotStream( "Current User", StreamMode::STD_READ );
+    std::unique_ptr<SvStream> pCurrentUserStream(rStorage.OpenSotStream( "Current User", StreamMode::STD_READ ));
     if( pCurrentUserStream )
     {
         ReadPptCurrentUserAtom(*pCurrentUserStream, maParam.aCurrentUserAtom);
-        delete pCurrentUserStream;
+        pCurrentUserStream.reset();
     }
 
     if( pDocument )