[vte] vteapp: Add comment pointing to the bug

[Christian Persch <chpe src gnome org>]

commit f49c6131ac5ac8f082a5212a3bf18dc9d5d4b1ca
Author: Christian Persch <chpe gnome org>
Date:   Mon May 12 11:04:49 2014 +0200

    vteapp: Add comment pointing to the bug

 src/app.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/app.vala b/src/app.vala
index 973dd34..c8315eb 100644
--- a/src/app.vala
+++ b/src/app.vala
@@ -60,6 +60,7 @@ class Window : Gtk.ApplicationWindow
           set_visual(visual);
       }
 
+      /* Without this transparency doesn't work; see bug #729884. */
       app_paintable = true;
     }