Bugfix: iconic taxon update was broken when iconic taxon id was nil.
Bugfix: iconic taxon update was broken when iconic taxon id was nil.

calonso-conabio/inaturalist,calonso-conabio/inaturalist,loarie/inaturalist,HotFusionMan/inaturalist,HotFusionMan/inaturalist,inaturalist/inaturalist,pleary/inaturalist,pleary/inaturalist,calonso-conabio/inaturalist,pleary/inaturalist,pleary/inaturalist,loarie/inaturalist,calonso-conabio/inaturalist,pleary/inaturalist,inaturalist/inaturalist,loarie/inaturalist,calonso-conabio/inaturalist,alexshepard/inaturalist,loarie/inaturalist,inaturalist/inaturalist,HotFusionMan/inaturalist,lucas-ez/inaturalist,lucas-ez/inaturalist,lucas-ez/inaturalist,alexshepard/inaturalist,lucas-ez/inaturalist,alexshepard/inaturalist,inaturalist/inaturalist,HotFusionMan/inaturalist,alexshepard/inaturalist,HotFusionMan/inaturalist,lucas-ez/inaturalist,alexshepard/inaturalist,loarie/inaturalist,inaturalist/inaturalist