Fix a crash when calling an object from a disposed application
Fix a crash when calling an object from a disposed application

GNOME/at-spi2-core,GNOME/at-spi2-core,gloob/gloob-s-at-spi2-core,GNOME/at-spi2-core,gloob/gloob-s-at-spi2-core,gloob/gloob-s-at-spi2-core