[gtk+] Ensure that print operation is alive until we're done

[Руслан Ижбулатов <ruslanizhb src gnome org>]

commit e934ddd4988e093cb2485b2dbfa2c22551639b0c
Author: Руслан Ижбулатов <lrn1986 gmail com>
Date:   Fri Jul 25 23:33:06 2014 +0000

    Ensure that print operation is alive until we're done
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733767

 gtk/gtkprintoperation.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkprintoperation.c b/gtk/gtkprintoperation.c
index 885c611..d13f6bc 100644
--- a/gtk/gtkprintoperation.c
+++ b/gtk/gtkprintoperation.c
@@ -3239,6 +3239,9 @@ gtk_print_operation_run (GtkPrintOperation        *op,
                                                                 &do_print);
     }
 
+  /* To ensure that priv is still valid after print_pages () */
+  g_object_ref (op);
+
   if (run_print_pages)
     print_pages (op, parent, do_print, result);
 
@@ -3250,6 +3253,7 @@ gtk_print_operation_run (GtkPrintOperation        *op,
   else if (priv->cancelled)
     result = GTK_PRINT_OPERATION_RESULT_CANCEL;
  
+  g_object_unref (op);
   return result;
 }