[mutter] Fix gtk-doc more

[Giovanni Campagna <gcampagna src gnome org>]

commit a180e8b87ed7cd82f423706a290cb46df80668e9
Author: Giovanni Campagna <scampa giovanni gmail com>
Date:   Thu Jan 1 21:32:32 2015 +0100

    Fix gtk-doc more
    
    Apparently having a successful build is not enough to prove
    that a build fix is correct

 doc/reference/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/reference/Makefile.am b/doc/reference/Makefile.am
index d1aa30c..6794e96 100644
--- a/doc/reference/Makefile.am
+++ b/doc/reference/Makefile.am
@@ -81,7 +81,7 @@ IGNORE_HFILES= \
        keybindings-private.h \
        meta-background-actor-private.h \
        meta-background-group-private.h \
-       meta-dbus-login1.h
+       meta-dbus-login1.h \
        meta-module.h \
        meta-plugin-manager.h \
        meta-shadow-factory-private.h \