gmp: fix bug in SetString

R=adg
CC=golang-dev
https://golang.org/cl/1004045

diff --git a/misc/cgo/gmp/gmp.go b/misc/cgo/gmp/gmp.go
index 33c16de773214cdb6920b11bba59721d81afc61d..f7bbe9c5145e61b70bdf6bbf3bda1f32d3d4a899 100644 (file)
--- a/misc/cgo/gmp/gmp.go
+++ b/misc/cgo/gmp/gmp.go
@@ -190,7 +190,7 @@ func (z *Int) SetString(s string, base int) os.Error {
        if C.mpz_set_str(&z.i[0], p, C.int(base)) < 0 {
                return os.EINVAL
        }
-       return z
+       return nil
 }
 
 // String returns the decimal representation of z.