Use byte literal in libnum

diff --git a/src/libnum/bigint.rs b/src/libnum/bigint.rs
index 4dd3817e475ed7ade94875bfb85b1773bc1736f5..3a5f7649201cb6ce0f50493aef765f05b785a400 100644 (file)
--- a/src/libnum/bigint.rs
+++ b/src/libnum/bigint.rs
@@ -1376,7 +1376,7 @@ pub fn parse_bytes(buf: &[u8], radix: uint) -> Option<BigInt> {
         if buf.is_empty() { return None; }
         let mut sign  = Plus;
         let mut start = 0;
-        if buf[0] == ('-' as u8) {
+        if buf[0] == b'-' {
             sign  = Minus;
             start = 1;
         }