desktop-shell: destroy weston_desktop

Plugs ASan reported leaks:

Direct leak of 88 byte(s) in 1 object(s) allocated from:
    #0 0x7f338f70a518 in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0xe9518)
    #1 0x7f338afe22f3 in zalloc ../../git/weston/include/libweston/zalloc.h:38
    #2 0x7f338afe3cc2 in weston_desktop_xwayland_init ../../git/weston/libweston-desktop/xwayland.c:410
    #3 0x7f338afdbaef in weston_desktop_create ../../git/weston/libweston-desktop/libweston-desktop.c:87
    #4 0x7f338b148d39 in wet_shell_init ../../git/weston/desktop-shell/shell.c:5224
    #5 0x7f338f5e9de5 in wet_load_shell ../../git/weston/compositor/main.c:956
    #6 0x7f338f5fadb9 in wet_main ../../git/weston/compositor/main.c:3434
    #7 0x5646d2392fc6 in execute_compositor ../../git/weston/tests/weston-test-fixture-compositor.c:432
    #8 0x5646d23969fa in weston_test_harness_execute_as_client ../../git/weston/tests/weston-test-runner.c:528
    #9 0x5646d2386bd6 in fixture_setup ../../git/weston/tests/viewporter-test.c:46
    #10 0x5646d2386c58 in fixture_setup_run_ ../../git/weston/tests/viewporter-test.c:48
    #11 0x5646d2396faf in main ../../git/weston/tests/weston-test-runner.c:661
    #12 0x7f338f25f09a in __libc_start_main ../csu/libc-start.c:308
    #13 0x5646d2386769 in _start (/home/pq/build/weston-meson/tests/test-viewporter+0xc769)

Indirect leak of 152 byte(s) in 1 object(s) allocated from:
    #0 0x7f338f70a518 in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0xe9518)
    #1 0x7f338afdb811 in zalloc ../../git/weston/include/libweston/zalloc.h:38
    #2 0x7f338afdb92d in weston_desktop_create ../../git/weston/libweston-desktop/libweston-desktop.c:65
    #3 0x7f338b148d39 in wet_shell_init ../../git/weston/desktop-shell/shell.c:5224
    #4 0x7f338f5e9de5 in wet_load_shell ../../git/weston/compositor/main.c:956
    #5 0x7f338f5fadb9 in wet_main ../../git/weston/compositor/main.c:3434
    #6 0x5646d2392fc6 in execute_compositor ../../git/weston/tests/weston-test-fixture-compositor.c:432
    #7 0x5646d23969fa in weston_test_harness_execute_as_client ../../git/weston/tests/weston-test-runner.c:528
    #8 0x5646d2386bd6 in fixture_setup ../../git/weston/tests/viewporter-test.c:46
    #9 0x5646d2386c58 in fixture_setup_run_ ../../git/weston/tests/viewporter-test.c:48
    #10 0x5646d2396faf in main ../../git/weston/tests/weston-test-runner.c:661
    #11 0x7f338f25f09a in __libc_start_main ../csu/libc-start.c:308
    #12 0x5646d2386769 in _start (/home/pq/build/weston-meson/tests/test-viewporter+0xc769)

Indirect leak of 72 byte(s) in 1 object(s) allocated from:
    #0 0x7f338f70a518 in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0xe9518)
    #1 0x7f338afdc5ae in zalloc ../../git/weston/include/libweston/zalloc.h:38
    #2 0x7f338afdc89e in weston_desktop_client_create ../../git/weston/libweston-desktop/client.c:108
    #3 0x7f338afe3d2a in weston_desktop_xwayland_init ../../git/weston/libweston-desktop/xwayland.c:415
    #4 0x7f338afdbaef in weston_desktop_create ../../git/weston/libweston-desktop/libweston-desktop.c:87
    #5 0x7f338b148d39 in wet_shell_init ../../git/weston/desktop-shell/shell.c:5224
    #6 0x7f338f5e9de5 in wet_load_shell ../../git/weston/compositor/main.c:956
    #7 0x7f338f5fadb9 in wet_main ../../git/weston/compositor/main.c:3434
    #8 0x5646d2392fc6 in execute_compositor ../../git/weston/tests/weston-test-fixture-compositor.c:432
    #9 0x5646d23969fa in weston_test_harness_execute_as_client ../../git/weston/tests/weston-test-runner.c:528
    #10 0x5646d2386bd6 in fixture_setup ../../git/weston/tests/viewporter-test.c:46
    #11 0x5646d2386c58 in fixture_setup_run_ ../../git/weston/tests/viewporter-test.c:48
    #12 0x5646d2396faf in main ../../git/weston/tests/weston-test-runner.c:661
    #13 0x7f338f25f09a in __libc_start_main ../csu/libc-start.c:308
    #14 0x5646d2386769 in _start (/home/pq/build/weston-meson/tests/test-viewporter+0xc769)

Oops.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

desktop-shell/shell.c

@@ -5024,6 +5024,8 @@ shell_destroy(struct wl_listener *listener, void *data)
 	wl_list_remove(&shell->output_move_listener.link);
 	wl_list_remove(&shell->resized_listener.link);
 
+	weston_desktop_destroy(shell->desktop);
+
 	wl_array_for_each(ws, &shell->workspaces.array)
 		workspace_destroy(*ws);
 	wl_array_release(&shell->workspaces.array);