[gupnp-tools] av-cp: Fix compiling when using recent GUPnP-AV

[Jens Georg <jensgeorg src gnome org>]

commit e9ec9634207e4c2eea6d268ee29b57e687c1f178
Author: Jens Georg <mail jensge org>
Date:   Sun Oct 16 21:51:39 2016 +0200

    av-cp: Fix compiling when using recent GUPnP-AV
    
    Inlcude gupnp.h ourselves, gupnp-av.h doesn't drag it in anymore
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/av-cp/playlist-treeview.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/av-cp/playlist-treeview.h b/src/av-cp/playlist-treeview.h
index 8637ae8..16b131e 100644
--- a/src/av-cp/playlist-treeview.h
+++ b/src/av-cp/playlist-treeview.h
@@ -23,6 +23,8 @@
 
 #include <config.h>
 #include <gtk/gtk.h>
+
+#include <libgupnp/gupnp.h>
 #include <libgupnp-av/gupnp-av.h>
 
 typedef void (* MetadataFunc) (const char *metadata,