Amends 94d7603d51.
The port from QVector<QPlatformTextureList*> to a container of
unique_ptr<QPlatformTextureList> uncovered that QPlatformTextureList
isn't defined for QT_NO_OPENGL builds.
Some unguarded forward-declarations made the old declaration compile
by accident. The new code caught this, so add the #ifdef that had been
missing all along.
Change-Id: If3b14fc24007b1c917a41ab83343c2e5e65fc643
Reviewed-by: Martin Storsjö <martin@martin.st>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Tasuku Suzuki <tasuku.suzuki@qbc.io>
7ac6cefd8a