Emit a better error message when enountering an asset with a missing file name in tranforms/writeAssetsToDisc
Emit a better error message when enountering an asset with a missing file name in tranforms/writeAssetsToDisc

jscinoz/assetgraph,jscinoz/assetgraph,papandreou/assetgraph,assetgraph/assetgraph,papandreou/assetgraph,jscinoz/assetgraph,papandreou/assetgraph