* clutter/glx/clutter-stage-glx.c:
(clutter_stage_glx_unrealize): Move the shaders release from here...
* clutter/glx/clutter-backend-glx.c:
(clutter_backend_glx_dispose): ... to here. Shaders should be
released when the GL context is being destroyed, and that only
happens when the backend is being disposed, now that we support
multiple stages.
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