Fixed a bug causing failure when user strings are empty.

src/data.rs

@@ -39,6 +39,7 @@ pub enum AccessLevel {
 
 impl AccessLevel {
     pub fn from_str(s: &str) -> AccessLevel {
+        if s.len() == 0 { Member } else {
             match s.char_at(0) {
                 '~' => Owner,
                 '&' => Admin,
@@ -49,6 +50,7 @@ impl AccessLevel {
             }
         }
     }
+}
 
 #[deriving(Show, PartialEq)]
 pub struct Message<'a> {