Use byte literal in libnum

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libnum/bigint.rs b/src/libnum/bigint.rs
index 4dd3817e475..3a5f7649201 100644
--- a/src/libnum/bigint.rs
+++ b/src/libnum/bigint.rs
@@ -1376,7 +1376,7 @@ impl 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;
         }