Relation.resolve: Emit warning instead of error when a relation multiplies to nothing. This relaxes the behavior a bit when encountering unknown protocols like irc://
Relation.resolve: Emit warning instead of error when a relation multiplies to nothing. This relaxes the behavior a bit when encountering unknown protocols like irc://

papandreou/assetgraph,slang800/assetgraph,slang800/assetgraph,assetgraph/assetgraph,papandreou/assetgraph,jscinoz/assetgraph,jscinoz/assetgraph,papandreou/assetgraph,jscinoz/assetgraph