Check if there are any authors to speak of, instead of failing.

1 files changed, 10 insertions, 8 deletions

diff --git a/sift.go b/sift.go
index 284a8fa..fdd01fd 100644
--- a/sift.go
+++ b/sift.go
@@ -107,14 +107,16 @@ func main() {
 					}
 				}
 
-				authorsMap := m["authors"].([]interface{})
-				for i, author := range authorsMap {
-					authorText := author.(string)
-					if i > 0 {
-						authors += " & "
-						authors += authorText
-					} else {
-						authors = authorText
+				if m["authors"] != nil {
+					authorsMap := m["authors"].([]interface{})
+					for i, author := range authorsMap {
+						authorText := author.(string)
+						if i > 0 {
+							authors += " & "
+							authors += authorText
+						} else {
+							authors = authorText
+						}
 					}
 				}