Backport of "d3d11videosink: Fix build error on UWP" into 1.18
requested to merge tpm/gst-plugins-bad:backport-mr-1961-into-1.18-d3d11videosink-build-error into 1.18
Backport of !1961 (merged) "d3d11videosink: Fix build error on UWP".
Commits:
- 3f43fef3 d3d11videosink: Fix build error on UWP