Address Savannah bug #44566: Unused variable warnings with -DNDEBUG

With -Werror -DNDEBUG, these two cases end up failing with unused variables
(gcc 4.9 with lots of patches on Linux).  The attached patch solves the issue
for me, but it's possible that it might be better with the UNUSEDs wrapped in

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler.h b/compiler.h
index f0041384..8159d776 100644
--- a/compiler.h
+++ b/compiler.h
@@ -40,7 +40,7 @@
 /* Needed because 4.x versions of GCC are really annoying */
 #define ignore_return(funcall) \
     do { \
-        ssize_t locresult = (funcall); \
+        UNUSED ssize_t locresult = (funcall); \
         assert(locresult != -23); \
     } while (0)