In-line Portrait Generation

internal/topdata/portraits_migrate.go

@@ -1,6 +1,8 @@
 package topdata
 
 func importLegacyPortraits(referenceBuilderDir, dataDir string, legacyTLK *legacyTLKData) (int, error) {
-	_ = legacyTLK
+	if legacyTLK == nil {
+		return 0, nil
+	}
 	return importLegacyDatasetMirror(referenceBuilderDir, dataDir, "portraits", "portraits.2da", nil)
 }