[gtk+] GtkAppChooser: Deal with 'no app found' gracefully

[Matthias Clasen <matthiasc src gnome org>]

commit 6d797d5356cf7af445befb846e260b92e6cece2c
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 28 22:43:20 2011 -0400

    GtkAppChooser: Deal with 'no app found' gracefully
    
    Several functions inside GtkAppChooserDialog were not handling
    the situation that app_info might be NULL after the user clicked
    'Select'.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=651827

 gtk/gtkappchooserdialog.c |   22 +++++++++++++++-------
 1 files changed, 15 insertions(+), 7 deletions(-)
---
diff --git a/gtk/gtkappchooserdialog.c b/gtk/gtkappchooserdialog.c
index 5f0de03..178d291 100644
--- a/gtk/gtkappchooserdialog.c
+++ b/gtk/gtkappchooserdialog.c
@@ -212,6 +212,12 @@ check_application (GtkAppChooserDialog  *self,
   command = NULL;
 
   info = gtk_app_chooser_get_app_info (GTK_APP_CHOOSER (self->priv->app_chooser_widget));
+  if (info == NULL)
+    {
+      *app_out = NULL;
+      return FALSE;
+    }
+
   command = g_app_info_get_executable (info);
 
   g_shell_parse_argv (command, &argc, &argv, &error);
@@ -258,13 +264,15 @@ add_or_find_application (GtkAppChooserDialog *self)
 
   app = gtk_app_chooser_get_app_info (GTK_APP_CHOOSER (self));
 
-  /* we don't care about reporting errors here */
-  if (self->priv->content_type)
-    g_app_info_set_as_last_used_for_type (app,
-					  self->priv->content_type,
-					  NULL);
-
-  g_object_unref (app);
+  if (app)
+    {
+      /* we don't care about reporting errors here */
+      if (self->priv->content_type)
+        g_app_info_set_as_last_used_for_type (app,
+                                              self->priv->content_type,
+                                              NULL);
+      g_object_unref (app);
+    }
 }
 
 static void