qtsink: Check gst_gl_display_add_context()
If there's already a context (or it fails to set it), we should abort switching to READY.
Also re-indent that function (selective gst-indent)
CID #1462818
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If there's already a context (or it fails to set it), we should abort switching to READY.
Also re-indent that function (selective gst-indent)
CID #1462818