master 02f5a41: Pacify buggy old GCC with a cast

[Paul Eggert]

branch: master
commit 02f5a419fdcfb3fb6c8a3e4debe7224010b40227
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>

    Pacify buggy old GCC with a cast
    
    * src/bignum.h (bignum_integer): Pacify GCC 4.8.5.
    Problem reported by Andreas Schwab in:
    https://lists.gnu.org/r/emacs-devel/2020-05/msg00781.html
---
 src/bignum.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/bignum.h b/src/bignum.h
index ad9021f..4a906c3 100644
--- a/src/bignum.h
+++ b/src/bignum.h
@@ -108,7 +108,8 @@ bignum_integer (mpz_t *tmp, Lisp_Object i)
   if (FIXNUMP (i))
     {
       mpz_set_intmax (*tmp, XFIXNUM (i));
-      return tmp;
+      /* The unnecessary cast pacifies a buggy GCC 4.8.5.  */
+      return (mpz_t const *) tmp;
     }
   return xbignum_val (i);
 }