[rygel] examples: Properly initialize user data

[Jens Georg <jensgeorg src gnome org>]

commit 1ebf4a7b269300f1393b19cb4770a57664cd485d
Author: Jens Georg <mail jensge org>
Date:   Tue Feb 12 23:02:23 2019 +0100

    examples: Properly initialize user data
    
    Otherwise the full-screen renderer crashes if the logo is not available

 examples/fullscreen-renderer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/examples/fullscreen-renderer.c b/examples/fullscreen-renderer.c
index 517ad198..124be41f 100644
--- a/examples/fullscreen-renderer.c
+++ b/examples/fullscreen-renderer.c
@@ -151,7 +151,7 @@ static gboolean on_key_released (GtkWidget *widget,
 int main (int argc, char *argv[])
 {
     RygelPlaybinRenderer *renderer;
-    MainData data;
+    MainData data  = { 0 };
     GdkCursor *cursor;
 
     gtk_init (&argc, &argv);