Fixes leaks:
==1060013== 96 (32 direct, 64 indirect) bytes in 1 blocks are definitely lost in loss record 10,897 of 13,064
==1060013== at 0x4F81D57: g_type_create_instance (gtype.c:1929)
==1060013== by 0x4F64ABF: g_object_new_internal.part.0 (gobject.c:2606)
==1060013== by 0x4F66ADD: g_object_new_internal (gobject.c:2603)
==1060013== by 0x4F66ADD: g_object_new_with_properties (gobject.c:2769)
==1060013== by 0x4F67A30: g_object_new (gobject.c:2415)
==1060013== by 0x52F7C7B: clutter_color_state_new_full (clutter-color-state.c:339)
==1060013== by 0x4939CD0: update_color_state (meta-color-device.c:725)
==1060013== by 0x4939DDE: meta_color_device_new (meta-color-device.c:759)
==1060013== by 0x493CB7B: update_devices (meta-color-manager.c:205)
==1060013== by 0x493CE65: meta_color_manager_monitors_changed (meta-color-manager.c:264)
==1060013== by 0x49341CB: meta_backend_monitors_changed (meta-backend.c:371)
==1060013== by 0x4969150: meta_monitor_manager_notify_monitors_changed (meta-monitor-manager.c:1235)
==1060013== by 0x496928F: meta_monitor_manager_setup (meta-monitor-manager.c:1273)
==1060013==
==1060013== 96 (32 direct, 64 indirect) bytes in 1 blocks are definitely lost in loss record 10,898 of 13,064
==1060013== at 0x4F81D57: g_type_create_instance (gtype.c:1929)
==1060013== by 0x4F64ABF: g_object_new_internal.part.0 (gobject.c:2606)
==1060013== by 0x4F66ADD: g_object_new_internal (gobject.c:2603)
==1060013== by 0x4F66ADD: g_object_new_with_properties (gobject.c:2769)
==1060013== by 0x4F67A30: g_object_new (gobject.c:2415)
==1060013== by 0x52F7C7B: clutter_color_state_new_full (clutter-color-state.c:339)
==1060013== by 0x4939CD0: update_color_state (meta-color-device.c:725)
==1060013== by 0x4939DDE: meta_color_device_new (meta-color-device.c:759)
==1060013== by 0x493CB7B: update_devices (meta-color-manager.c:205)
==1060013== by 0x493CE65: meta_color_manager_monitors_changed (meta-color-manager.c:264)
==1060013== by 0x49341CB: meta_backend_monitors_changed (meta-backend.c:371)
==1060013== by 0x4969150: meta_monitor_manager_notify_monitors_changed (meta-monitor-manager.c:1235)
==1060013== by 0x496EA7D: meta_monitor_manager_rebuild (meta-monitor-manager.c:3968)
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4149>
(cherry picked from commit 376c0585ef00b3af49f2255860d7591dcfe067d2)