Fix missing bump in RECV lexer case.

Author: msullivan

src/comp/front/lexer.rs

@@ -681,6 +681,7 @@ fn next_token(&reader rdr) -> token::token {
                     ret token::OROR;
                 }
                 case ('>') {
+                    rdr.bump();
                     rdr.bump();
                     ret token::RECV;
                 }