beagle-query prints an ugly backtrace when no DBUS session environment variables are set.

We should catch DBusException's seperately and provide more user-friendly output.

http://bugs.gnome.org/show_bug.cgi?id=167755

Index: Query.cs
===================================================================
RCS file: /cvs/gnome/beagle/tools/Query.cs,v
retrieving revision 1.35
diff -u -B -r1.35 Query.cs
--- Query.cs	15 Jan 2005 05:35:02 -0000	1.35
+++ Query.cs	17 Feb 2005 23:15:25 -0000
@@ -147,6 +147,9 @@
 
 		try {
 			query = Beagle.Factory.NewQuery ();
+		} catch (DBus.DBusException e) {
+			Console.WriteLine ("Could not query.  You probably don't have D-BUS set up properly.\nThe query failed with error: {0}", e.Message);
+			System.Environment.Exit (-1);
 		} catch (Exception e) {
 			if (e.ToString ().IndexOf ("com.novell.Beagle") != -1) {
 				Console.WriteLine ("Could not query.  The Beagle daemon is probably not running, or maybe you\ndon't have D-BUS set up properly.");