ui/dbus: initialize cursor_fb

Or else, we may randomly destroy some textures..

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h
index 2fb6e0d..c92dd90 100644
--- a/include/ui/egl-helpers.h
+++ b/include/ui/egl-helpers.h
@@ -22,6 +22,8 @@
     QemuDmaBuf *dmabuf;
 } egl_fb;
 
+#define EGL_FB_INIT { 0, }
+
 void egl_fb_destroy(egl_fb *fb);
 void egl_fb_setup_default(egl_fb *fb, int width, int height);
 void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
diff --git a/ui/dbus-listener.c b/ui/dbus-listener.c
index 57d4e40..2dafd65 100644
--- a/ui/dbus-listener.c
+++ b/ui/dbus-listener.c
@@ -149,7 +149,7 @@
     DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
     DisplaySurface *ds;
     GVariant *v_data = NULL;
-    egl_fb cursor_fb;
+    egl_fb cursor_fb = EGL_FB_INIT;
 
     if (!dmabuf) {
         qemu_dbus_display1_listener_call_mouse_set(