...which had been left out because "lots of our code uses this style, which I'm
loathe to bulk-fix as yet", but now in
<https://gerrit.libreoffice.org/#/c/45060/1/> "use std::unique_ptr" would have
caused an otherwise innocent-looking code change to trigger a
loplugin:unnecessaryparen warning for

  pFormat = (pGrfObj)
      ? ...

(barring a change to ignoreAllImplicit in
compilerplugins/clang/unnecessaryparen.cxx similar to that in
<https://gerrit.libreoffice.org/#/c/45083/2> "Make not warning about !! in
loplugin:simplifybool consistent", which should also have caused the warning to
disappear for the modified code, IIUC).

Change-Id: I8bff0cc11bbb839ef06d07b8d9237f150804fec2
Reviewed-on: https://gerrit.libreoffice.org/45088Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>