Don't leak message
Don't leak message

https://bugzilla.gnome.org/show_bug.cgi?id=684077

Distrotech/at-spi2-atk,Distrotech/at-spi2-atk,GNOME/at-spi2-core,GNOME/at-spi2-core,GNOME/at-spi2-atk,GNOME/at-spi2-core