Fix tonumber("-0").

Reported by bluecheetah001.

1 files changed, 2 insertions, 3 deletions

diff --git a/src/lj_strscan.c b/src/lj_strscan.c
index f1e34a3d..1ae68c3f 100644
--- a/src/lj_strscan.c
+++ b/src/lj_strscan.c
@@ -445,12 +445,11 @@ StrScanFmt lj_strscan_scan(const uint8_t *p, TValue *o, uint32_t opt)
     /* Fast path for decimal 32 bit integers. */
     if (fmt == STRSCAN_INT && base == 10 &&
         (dig < 10 || (dig == 10 && *sp <= '2' && x < 0x80000000u+neg))) {
-      int32_t y = neg ? -(int32_t)x : (int32_t)x;
       if ((opt & STRSCAN_OPT_TONUM)) {
-        o->n = (double)y;
+        o->n = neg ? -(double)x : (double)x;
         return STRSCAN_NUM;
       } else {
-        o->i = y;
+        o->i = neg ? -(int32_t)x : (int32_t)x;
         return STRSCAN_INT;
       }
     }