Do not free the pointer to the boxed type we get when serialising
Do not free the pointer to the boxed type we get when serialising

The pointer returned by g_value_get_boxed() is just a pointer to the internal
copy inside GValue, and it's not ours to free, as Valgrind gently pointed
out.

GNOME/json-glib,Distrotech/json-glib,oerdnj/json-glib,frida/json-glib,Distrotech/json-glib,robtaylor/json-glib-gvariant,brauliobo/json-glib,brauliobo/json-glib,ebassi/json-glib,ebassi/json-glib,oerdnj/json-glib,GNOME/json-glib,ebassi/json-glib,oerdnj/json-glib,robtaylor/json-glib-gvariant,brauliobo/json-glib,frida/json-glib,Distrotech/json-glib,oerdnj/json-glib