Migrating to our ldap fork (#12149)

vendor/github.com/mattermost/ldap/ldap.go

@@ -270,10 +270,18 @@ func addRequestDescriptions(packet *ber.Packet) error {
 }
 
 func addDefaultLDAPResponseDescriptions(packet *ber.Packet) error {
-	err := GetLDAPError(packet)
-	packet.Children[1].Children[0].Description = "Result Code (" + LDAPResultCodeMap[err.(*Error).ResultCode] + ")"
-	packet.Children[1].Children[1].Description = "Matched DN (" + err.(*Error).MatchedDN + ")"
-	packet.Children[1].Children[2].Description = "Error Message"
+	resultCode := uint16(LDAPResultSuccess)
+	matchedDN := ""
+	description := "Success"
+	if err := GetLDAPError(packet); err != nil {
+		resultCode = err.(*Error).ResultCode
+		matchedDN = err.(*Error).MatchedDN
+		description = "Error Message"
+	}
+
+	packet.Children[1].Children[0].Description = "Result Code (" + LDAPResultCodeMap[resultCode] + ")"
+	packet.Children[1].Children[1].Description = "Matched DN (" + matchedDN + ")"
+	packet.Children[1].Children[2].Description = description
 	if len(packet.Children[1].Children) > 3 {
 		packet.Children[1].Children[3].Description = "Referral"
 	}