Fixed AssetGraph.populateRelationsToExistingAssets.
Fixed AssetGraph.populateRelationsToExistingAssets.

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