[balsa/gtk3] Check for NULL focus widget

[Peter Bloomfield <PeterB src gnome org>]

commit 29aaa90324ee801155b31e149f60af97ccef7222
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Thu Jun 7 11:49:14 2012 -0400

    Check for NULL focus widget
    
    	* src/main-window.c: check for NULL focus widget.

 ChangeLog         |    4 ++++
 src/main-window.c |    3 +++
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index d09de0c..7fe5dc9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2012-06-07  Peter Bloomfield
+
+	* src/main-window.c: check for NULL focus widget.
+
 2012-06-06  Peter Bloomfield
 
 	* libbalsa/mailbox.c (libbalsa_mailbox_close), (lbm_msgno_removed),
diff --git a/src/main-window.c b/src/main-window.c
index f8a9df7..15e5998 100644
--- a/src/main-window.c
+++ b/src/main-window.c
@@ -3795,6 +3795,9 @@ bw_copy_cb(GtkAction * action, gpointer data)
     guint signal_id;
     GtkWidget *focus_widget = gtk_window_get_focus(GTK_WINDOW(bw));
 
+    if (!focus_widget)
+	return;
+
     signal_id = g_signal_lookup("copy-clipboard",
                                 G_TYPE_FROM_INSTANCE(focus_widget));
     if (signal_id)