Only allow one BrushTip per BrushCoat in interface #150
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Only allow one BrushTip per BrushCoat in interface
BrushCoats with multiple or zero tips already failed validation. The intention was eventually to support multiple BrushTips per BrushCoat, but that plan has become disfavored, since the use case can be supported with multiple BrushCoats per BrushFamily.
The proto change is technically not backwards compatible, it changes the behavior of decoding old protos encoded with multiple BrushTips per BrushCoat from "fail validation" to "take the last one". However, such a structure wouldn't have worked previously anyways.