[PATCH] stdlib/gmp-impl.h: Silence -Wundef warning for USE_STACK_ALLOC

[Will Newton]

The upstream version of GMP has long removed this conditional
altogether in this commit:

changeset:   5254:88618a4694ac
user:        Kevin Ryde <user42@zip.com.au>
date:        Sun Jun 17 01:37:27 2001 +0200

So just turn the #if into an #ifdef to silence the warning.

ChangeLog:

2014-04-25  Will Newton  <will.newton@linaro.org>

	* stdlib/gmp-impl.h: Test USE_STACK_ALLOC #ifdef
	rather than #if.
---
 stdlib/gmp-impl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/gmp-impl.h b/stdlib/gmp-impl.h
index 83865dc..b7da5bd 100644
--- a/stdlib/gmp-impl.h
+++ b/stdlib/gmp-impl.h
@@ -47,7 +47,7 @@ along with the GNU MP Library; see the file COPYING.LIB.  If not, see
 #endif
 #endif
 
-#if ! defined (HAVE_ALLOCA) || USE_STACK_ALLOC
+#if ! defined (HAVE_ALLOCA) || defined (USE_STACK_ALLOC)
 #include "stack-alloc.h"
 #else
 #define TMP_DECL(m)
-- 
1.9.0