qt: check for QT_QUICK_BACKEND before applying the fallback procedure (!5863) · Merge requests · VideoLAN / VLC

QSG_RHI_BACKEND determines the RHI backend, but software or OpenVG are not part of RHI but rather independent backends.

We should not apply the fallback procedure if QT_QUICK_BACKEND is specified, which might be software or openvg.

Request review @chub.

qt: check for QT_QUICK_BACKEND before applying the fallback procedure