librustc: Don't accept as Trait anymore; fix all occurrences of it.

src/libsyntax/ext/tt/macro_parser.rs

@@ -224,7 +224,7 @@ pub enum parse_result {
 pub fn parse_or_else(
     sess: @mut ParseSess,
     +cfg: ast::crate_cfg,
-    rdr: reader,
+    rdr: @reader,
     ms: ~[matcher]
 ) -> HashMap<ident, @named_match> {
     match parse(sess, cfg, rdr, ms) {
@@ -237,7 +237,7 @@ pub fn parse_or_else(
 pub fn parse(
     sess: @mut ParseSess,
     cfg: ast::crate_cfg,
-    rdr: reader,
+    rdr: @reader,
     ms: ~[matcher]
 ) -> parse_result {
     let mut cur_eis = ~[];