[tasque] [RTM] Fix #578279: Tasque crashes when RTM unavailable

[Antonius Riha <antoniusri src gnome org>]

commit 2096a16343f69a552381e5be25c90ffd21a18a11
Author: Antonius Riha <antoniusriha gmail com>
Date:   Sun Aug 26 23:45:11 2012 +0200

    [RTM] Fix #578279: Tasque crashes when RTM unavailable

 src/Backends/Rtm/RtmBackend.cs |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/src/Backends/Rtm/RtmBackend.cs b/src/Backends/Rtm/RtmBackend.cs
index 5fe5cc6..12b4aed 100644
--- a/src/Backends/Rtm/RtmBackend.cs
+++ b/src/Backends/Rtm/RtmBackend.cs
@@ -227,8 +227,12 @@ namespace Tasque.Backends.RtmBackend
 					rtm = null;
 					rtmAuth = null;
 					Logger.Error("Exception authenticating, reverting" + e.Message);
-				} 			
-				catch (RtmNet.RtmWebException e) {
+				} catch (ResponseXmlException e) {
+					rtm = null;
+					rtmAuth = null;
+					Logger.Error ("Cannot parse RTM response. Maybe the service is down."
+					              + e.Message);
+				} catch (RtmNet.RtmWebException e) {
 					rtm = null;
 					rtmAuth = null;
 					Logger.Error("Not connected to RTM, maybe proxy: #{0}", e.Message);