[gnote] Fix a crash when requesting help in the "Search All" in applet mode. (Closes #588489)

[Hubert Figuière <hub src gnome org>]

commit c863c8be4b8085f88d9a5b0e02d689c788ff0cc9
Author: Hubert Figuiere <hub figuiere net>
Date:   Mon Jul 13 16:56:25 2009 -0400

    Fix a crash when requesting help in the "Search All" in applet mode. (Closes #588489)

 src/gnote.cpp |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/src/gnote.cpp b/src/gnote.cpp
index 984343c..8166856 100644
--- a/src/gnote.cpp
+++ b/src/gnote.cpp
@@ -274,10 +274,12 @@ namespace gnote {
 
   void Gnote::on_show_help_action()
   {
-    GdkScreen *cscreen;
-    Gdk::Rectangle area;
-    GtkOrientation orientation;
-    gtk_status_icon_get_geometry(m_tray_icon->gobj(), &cscreen, area.gobj(), &orientation);
+    GdkScreen *cscreen = NULL;
+    if(m_tray_icon) {
+      Gdk::Rectangle area;
+      GtkOrientation orientation;
+      gtk_status_icon_get_geometry(m_tray_icon->gobj(), &cscreen, area.gobj(), &orientation);
+    }
     utils::show_help("gnote", "", cscreen, NULL);
   }