[gnome-settings-daemon] Fix the build by declaring a variable

[Emmanuele Bassi <ebassi src gnome org>]

commit 76a6453c9c588c7208e638dfda4efcbdfdeaf785
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Aug 15 08:41:19 2016 +0100

    Fix the build by declaring a variable

 plugins/common/test-input-helper.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/common/test-input-helper.c b/plugins/common/test-input-helper.c
index 1bb549a..cda2d0d 100644
--- a/plugins/common/test-input-helper.c
+++ b/plugins/common/test-input-helper.c
@@ -33,6 +33,7 @@ int main (int argc, char **argv)
 {
         GList *devices, *l;
        gboolean has_touchpad, has_touchscreen;
+        gboolean has_mouse;
 
        gtk_init (&argc, &argv);