a8e93e8588
To help us handle sliced textures; When flushing materials there is an override option that can be given to replace the texture name for layer0 so we may iterate the slices without needing to modify the material in use. Since improving the journal's ability to batch state changes we added a _cogl_material_equals function that is used by the journal to compare materials and identify when a state change is required, but this wasn't correctly considering the layer0 override resulting in false positives that meant the journal wouldn't update the GL state and the first texture name was used for all slices.