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	backend/drm: fix NULL dereference when unsetting cursor
This segfault happens on multi-GPU systems. Fixes https://github.com/swaywm/sway/issues/3717
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					 1 changed files with 2 additions and 3 deletions
				
			
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			@ -720,9 +720,8 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
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	}
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	struct gbm_bo *bo = plane->cursor_enabled ? plane->surf.back : NULL;
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	if (drm->parent) {
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		bo = copy_drm_surface_mgpu(&plane->mgpu_surf, plane->surf.back);
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	if (bo && drm->parent) {
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		bo = copy_drm_surface_mgpu(&plane->mgpu_surf, bo);
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	}
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	if (bo) {
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