[giggle] configure.ac: Do not warn for unused macros

[Javier JardÃn <jjardon src gnome org>]

commit 8ddf313fdf1aef47a30a1ad84bc46a57fd3fe8d6
Author: Javier JardÃn <jjardon gnome org>
Date:   Thu Sep 20 04:38:57 2012 +0900

    configure.ac: Do not warn for unused macros

 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 9138304..1082595 100644
--- a/configure.ac
+++ b/configure.ac
@@ -204,6 +204,8 @@ gl_MANYWARN_ALL_GCC([warnings])
 # Set up the list of the pointless, undesired warnings.
 nw=
 nw="$nw -Wsystem-headers"       # Don't let system headers trigger warnings
+nw="$nw -Wunused-macros"        # Unused macros are ok
+
 
 # Enable all GCC warnings not in this list.
 gl_MANYWARN_COMPLEMENT([warnings], [$warnings], [$nw])