[gnome-software] trivial: Use -Wunused

[Richard Hughes <rhughes src gnome org>]

commit c99f45737e1b76aa2bf8b0e4678a22be940951b3
Author: Richard Hughes <richard hughsie com>
Date:   Mon Nov 28 08:48:00 2016 +0000

    trivial: Use -Wunused

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4499bba..e28f069 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,6 +67,7 @@ WARN_CFLAGS_EXTRA="
        -Wundef
        -Wuninitialized
        -Wunused-but-set-variable
+       -Wunused
        -Wwrite-strings"
 AX_APPEND_COMPILE_FLAGS([$WARN_CFLAGS_EXTRA], [WARN_CFLAGS])
 AC_SUBST(WARN_CFLAGS)