* sys/glsink/glimagesink.c: Fix problems when the element cannot open the display. (fixes #357212)
* sys/glsink/glimagesink.c:
Fix problems when the element cannot open the display.
(fixes #357212)

ystreet/gst-plugins-gl,ystreet/gst-plugins-gl,ystreet/gst-plugins-gl,mapmapteam/gst-plugins-gl,mapmapteam/gst-plugins-gl,mapmapteam/gst-plugins-gl