[java-atk-wrapper] Build: Address warning in autogen.sh

[Magdalen Berns <mberns src gnome org>]

commit f35407ada9840101e1634c850bea6171cd40a4f2
Author: Magdalen Berns <m berns thismagpie com>
Date:   Sat Jul 4 22:17:50 2015 +0100

    Build: Address warning in autogen.sh
    
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=751958

 autogen.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 9ad1327..eb4f422 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -10,7 +10,7 @@ cd "$srcdir"
 mkdir -p m4
 
 AUTORECONF=`which autoreconf`
-if test -z $AUTORECONF; then
+if test -z ${AUTORECONF}; then
         echo "*** No autoreconf found, please intall it ***"
         exit 1
 else