Fix build and compilation.

src/data_forms.rs

@@ -86,7 +86,7 @@ impl IntoElements for Field {
     }
 }
 
-generate_attribute!(Subscription, "subscription", {
+generate_attribute!(DataFormType, "type", {
     Cancel => "cancel",
     Form => "form",
     Result_ => "result",
@@ -272,7 +272,7 @@ mod tests {
             Error::ParseError(string) => string,
             _ => panic!(),
         };
-        assert_eq!(message, "Unknown data form type.");
+        assert_eq!(message, "Unknown value for 'type' attribute.");
     }
 
     #[test]

src/ibb.rs

@@ -181,6 +181,6 @@ mod tests {
             Error::ParseError(string) => string,
             _ => panic!(),
         };
-        assert_eq!(message, "Invalid 'stanza' attribute.");
+        assert_eq!(message, "Unknown value for 'stanza' attribute.");
     }
 }

src/jingle_ibb.rs

@@ -107,6 +107,6 @@ mod tests {
             Error::ParseError(string) => string,
             _ => panic!(),
         };
-        assert_eq!(message, "Invalid 'stanza' attribute.");
+        assert_eq!(message, "Unknown value for 'stanza' attribute.");
     }
 }

src/message.rs

@@ -236,7 +236,7 @@ mod tests {
 
     #[test]
     fn test_serialise() {
-        let elem: Element = "<message xmlns='jabber:client' type='normal'/>".parse().unwrap();
+        let elem: Element = "<message xmlns='jabber:client'/>".parse().unwrap();
         let message = Message {
             from: None,
             to: None,