475a72fd94
There were a few problems flushing texture overrides so that sliced textures would not work: * In _cogl_material_set_layer_texture it ignored the 'overriden' parameter and always set texture_overridden to FALSE. * cogl_texture_get_gl_texture wasn't being called correctly in override_layer_texture_cb. It returns a gboolean to indicate the error status but this boolean was being assigned to gl_target. * _cogl_material_layer_texture_equal did not take into account the override. * _cogl_material_layer_get_texture_info did not return the overridden texture so it would always use the first texture slice.