[gnome-settings-daemon] housekeeping: Fix libnotify version check

[Bastien Nocera <hadess src gnome org>]

commit c4450208d463c271c043364aa2542291877d53ae
Author: Antoine Jacoutot <ajacoutot gnome org>
Date:   Tue Apr 18 19:41:32 2017 +0200

    housekeeping: Fix libnotify version check
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781463

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0b5c4b1..27fb8af 100644
--- a/configure.ac
+++ b/configure.ac
@@ -181,7 +181,7 @@ PKG_CHECK_MODULES(DUMMY,
 PKG_CHECK_MODULES(HOUSEKEEPING,
                  gtk+-3.0
                  gio-unix-2.0
-                 libnotify >= LIBNOTIFY_REQUIRED_VERSION)
+                 libnotify >= $LIBNOTIFY_REQUIRED_VERSION)
 
 PKG_CHECK_MODULES(KEYBOARD,
                  gtk+-3.0)