[PATCH] declare free() in lib/free.c

[Lucy Phipps]

avoids an implicit declaration warning
---
lib/free.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/free.c b/lib/free.c
index 780f03dd1..804640c2e 100644
--- a/lib/free.c
+++ b/lib/free.c
@@ -27,9 +27,11 @@

 # include <errno.h>

+# undef free
+void free (void *);
+
 void
 rpl_free (void *p)
-# undef free
 {
 # if defined __GNUC__ && !defined __clang__
   /* An invalid GCC optimization