[gtkglarea] examples/zktor.c: Fix a GTK_OBJECT -> G_OBJECT leftover

[Javier Jardón <jjardon src gnome org>]

commit bbb06f8e9531e40d57339fcc168f2f239c158b3e
Author: Javier Jardón <javier jardon codethink co uk>
Date:   Thu Mar 20 13:45:25 2014 +0000

    examples/zktor.c: Fix a GTK_OBJECT -> G_OBJECT leftover

 examples/zktor.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/examples/zktor.c b/examples/zktor.c
index e345c35..c0cf47b 100644
--- a/examples/zktor.c
+++ b/examples/zktor.c
@@ -946,7 +946,7 @@ int main(int argc, char **argv)
   /* Capture keypress events */
   g_signal_connect(G_OBJECT(glarea), "key-press-event",
                    G_CALLBACK(key_press_event), NULL);
-  g_signal_connect(GTK_OBJECT(glarea), "key-release-event",
+  g_signal_connect(G_OBJECT(glarea), "key-release-event",
                    G_CALLBACK(key_release_event), NULL);
 
   /* construct widget hierarchy  */