modules/starboard: Fix starboard thumbnail

The code was looking in embeds when Discord places it in attachments. This has been rectified by making the code look in attachments instead.

modules/starboard/starboard.go

@@ -90,8 +90,8 @@ func ReactListener(s *discordgo.Session, m *discordgo.MessageReactionAdd) {
 			IconURL: "https://cdn.discordapp.com/avatars/" + msg.Author.ID + "/" + msg.Author.Avatar + ".png",
 		},
 	}
-	if len(msg.Embeds) > 0 && msg.Embeds[0].Image != nil {
-		img := msg.Embeds[0].Image
+	if len(msg.Attachments) > 0 && msg.Attachments[0] != nil && msg.Attachments[0].Width > 0 {
+		img := msg.Attachments[0]
 		embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
 			URL:      img.URL,
 			ProxyURL: img.ProxyURL,