[libseed] Commit c7daca0f removed set/get_property on gtype class.
[libseed] Commit c7daca0f removed set/get_property on gtype class.

This fixes breakage in adding properties to JS-side GTypes.

danilocesar/seed,danilocesar/seed,danilocesar/seed,danilocesar/seed,danilocesar/seed