Tidy up search a little

There's no reason to carry around a ZeroCopy here, since we own all the
values.

src/client.rs

@@ -623,15 +623,14 @@ impl <T: Read + Write> Session<T> {
 
     /// Searches the mailbox for messages that match the given criteria and returns
     /// the list of message sequence numbers of those messages.
-    pub fn search(&mut self, query: &str) -> ZeroCopyResult<HashSet<u32>> {
+    pub fn search(&mut self, query: &str) -> Result<HashSet<u32>> {
         self.run_command_and_read_response(&format!("SEARCH {}", query))
             .and_then(parse_ids)
     }
 
     /// Searches the mailbox for messages that match the given criteria and returns
     /// the list of unique identifier numbers of those messages.
-    pub fn uid_search(&mut self, query: &str) -> ZeroCopyResult<HashSet<u32>> {
+    pub fn uid_search(&mut self, query: &str) -> Result<HashSet<u32>> {
-        eprint!("{}", format!("UID SEARCH {}", query));
         self.run_command_and_read_response(&format!("UID SEARCH {}", query))
             .and_then(parse_ids)
     }

src/parse.rs

@@ -222,8 +222,8 @@ pub fn parse_mailbox(mut lines: &[u8]) -> Result<Mailbox> {
     }
 }
 
-pub fn parse_ids(lines: Vec<u8>) -> ZeroCopyResult<HashSet<u32>> {
+pub fn parse_ids(lines: Vec<u8>) -> Result<HashSet<u32>> {
-    let f = |mut lines| {
+    let mut lines = &lines[..];
     let mut ids = HashSet::new();
     loop {
         match imap_proto::parse_response(lines) {
@@ -243,9 +243,6 @@ pub fn parse_ids(lines: Vec<u8>) -> ZeroCopyResult<HashSet<u32>> {
             }
         }
     }
-    };
-
-    unsafe { ZeroCopy::new(lines, f) }
 }
 
 #[cfg(test)]