compositor-wayland: Only destroy the egl_window when using GLES.

This prevents a segfault when unplugging an output when using pixman.

Signed-off-by: Emmanuel Gil Peyrot <emmanuel.peyrot@collabora.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>

libweston/compositor-wayland.c

@@ -627,9 +627,9 @@ wayland_output_destroy(struct weston_output *output_base)
 		pixman_renderer_output_destroy(output_base);
 	} else {
 		gl_renderer->output_destroy(output_base);
+		wl_egl_window_destroy(output->gl.egl_window);
 	}
 
-	wl_egl_window_destroy(output->gl.egl_window);
 	wl_surface_destroy(output->parent.surface);
 	if (output->parent.shell_surface)
 		wl_shell_surface_destroy(output->parent.shell_surface);