[easytag] Open the online help if Yelp is not installed

[David King <davidk src gnome org>]

commit 3dbfd06126c259d163541b2b49d937df3692266d
Author: David King <amigadave amigadave com>
Date:   Sun Feb 28 22:02:17 2016 +0000

    Open the online help if Yelp is not installed
    
    If Yelp is not installed, or fails to start, show the online help instead.
    
    https://mail.gnome.org/archives/easytag-list/2016-February/msg00009.html

 src/application.c |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/src/application.c b/src/application.c
index da8cbda..ea0c196 100644
--- a/src/application.c
+++ b/src/application.c
@@ -52,19 +52,23 @@ on_help (GSimpleAction *action,
 {
     GError *error = NULL;
 
-#ifndef G_OS_WIN32
+    /* TODO: Link to locally-installed help on Windows. */
     gtk_show_uri (gtk_window_get_screen (GTK_WINDOW (MainWindow)),
                   "help:easytag", GDK_CURRENT_TIME, &error);
-#else /* G_OS_WIN32 */
-    /* TODO: Link to locally-installed help on Windows. */
+
+    if (error)
+    {
+        g_debug ("Error while opening help: %s", error->message);
+        g_clear_error (&error);
+    }
+
     gtk_show_uri (gtk_window_get_screen (GTK_WINDOW (MainWindow)),
                   "https://help.gnome.org/users/easytag/stable/";,
                   GDK_CURRENT_TIME, &error);
-#endif
 
     if (error)
     {
-        g_debug ("Error while opening help: %s", error->message);
+        g_debug ("Error while opening online help: %s", error->message);
         g_error_free (error);
     }
 }