[gtk+] build: Depend on wayland-protocols 1.9

[Timm Bäder <baedert src gnome org>]

commit 2a373b8ac87441acb651fbe22eda1e8cca469d32
Author: Timm Bäder <mail baedert org>
Date:   Tue Sep 5 10:07:54 2017 +0200

    build: Depend on wayland-protocols 1.9
    
    Needed for the keyboard shortcuts inhibit protocol

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 31f7071..995680a 100644
--- a/meson.build
+++ b/meson.build
@@ -30,7 +30,7 @@ atk_req            = '>= 2.15.1'
 cairo_req          = '>= 1.14.0'
 gdk_pixbuf_req     = '>= 2.30.0'
 introspection_req  = '>= 1.39.0'
-wayland_proto_req  = '>= 1.7'
+wayland_proto_req  = '>= 1.9'
 wayland_req        = '>= 1.9.91'
 mirclient_req      = '>= 0.22.0'
 mircookie_req      = '>= 0.17.0'