[gnome-builder] gui: ensure animation state contains full reference

[Christian Hergert <chergert src gnome org>]

commit 83da860263ab3db0df442e007ea5c5d0d2aa85d6
Author: Christian Hergert <chergert redhat com>
Date:   Sun Mar 3 12:46:47 2019 -0800

    gui: ensure animation state contains full reference
    
    Fixes #839

 src/libide/gui/ide-frame.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/libide/gui/ide-frame.c b/src/libide/gui/ide-frame.c
index 15f477930..5f2d1749d 100644
--- a/src/libide/gui/ide-frame.c
+++ b/src/libide/gui/ide-frame.c
@@ -626,7 +626,7 @@ ide_frame_pan_end (IdeFrame         *self,
       state->source = g_object_ref (self);
       state->dest = g_object_ref (dest);
       state->page = g_object_ref (priv->pan_page);
-      state->theatric = priv->pan_theatric;
+      state->theatric = g_object_ref (priv->pan_theatric);
 
       gtk_widget_translate_coordinates (GTK_WIDGET (dest_priv->top_stack), grid, 0, 0,
                                         &alloc.x, &alloc.y);