cppcheck: memleak (false positive)

but manage ownership from start

Change-Id: Ia9d29cc0e0676173c231c8b68b7681cc1b3dff86
Reviewed-on: https://gerrit.libreoffice.org/33392
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/editeng/source/editeng/editobj.cxx b/editeng/source/editeng/editobj.cxx
index 3f1f70f..3e3e8b7 100644
--- a/editeng/source/editeng/editobj.cxx
+++ b/editeng/source/editeng/editobj.cxx
@@ -1404,11 +1404,11 @@ void EditTextObjectImpl::CreateData( SvStream& rIStream )
                    aNewFontItem.SetFamilyName( GetFontToSubsFontName( hConv ) );

                    // Replace the existing attribute with a new one.
                    XEditAttribute* pNewAttr = CreateAttrib(aNewFontItem, rAttr.GetStart(), rAttr.GetEnd());

                    pC->maCharAttribs[nAttr] =
                            std::unique_ptr<XEditAttribute>(CreateAttrib(aNewFontItem, rAttr.GetStart(), rAttr.GetEnd()));
                    pPool->Remove(*rAttr.GetItem());
                    pC->maCharAttribs[nAttr] = std::unique_ptr<XEditAttribute>(pNewAttr);

                    XEditAttribute* pNewAttr = pC->maCharAttribs[nAttr].get();
                    for ( sal_uInt16 nChar = pNewAttr->GetStart(); nChar < pNewAttr->GetEnd(); nChar++ )
                    {
                        sal_Unicode cOld = pC->GetText()[ nChar ];