fix broken unsigned comparison in wcstoumax

diff --git a/src/stdlib/wcstoumax.c b/src/stdlib/wcstoumax.c
index 456dded..86528ef 100644 (file)
--- a/src/stdlib/wcstoumax.c
+++ b/src/stdlib/wcstoumax.c
@@ -34,7 +34,7 @@ uintmax_t wcstoumax(const wchar_t *s, wchar_t **p, int base)
 
        /* Convert to normal char string so we can use strtoumax */
        buf[0] = sign;
-       if (wcstombs(buf+!!sign, s, sizeof buf-1) < 0) return 0;
+       if (wcstombs(buf+!!sign, s, sizeof buf-1) == -1) return 0;
        buf[sizeof buf-1]=0;
 
        /* Compute final position */