[hyena] Log: honor message parameter in Error(msg,ex)

[Andrés Aragoneses <aaragoneses src gnome org>]

commit d7ff4ca3d1cdbd2f5e369c72d8ddbf7b74828f20
Author: Andrés G. Aragoneses <knocte gmail com>
Date:   Sat Aug 2 13:49:55 2014 +0200

    Log: honor message parameter in Error(msg,ex)
    
    After the refactoring to allow Error(ex) and Warning(ex)
    overloads, this detail was overlooked, as 'severe' bool
    param is no longer determined by the lack of message.

 Hyena/Hyena/Log.cs |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/Hyena/Hyena/Log.cs b/Hyena/Hyena/Log.cs
index 75a6c51..566116e 100644
--- a/Hyena/Hyena/Log.cs
+++ b/Hyena/Hyena/Log.cs
@@ -454,10 +454,11 @@ namespace Hyena
                 }
             }
 
+            var msg = message ?? "Caught an exception";
             if (!severe) {
-                Log.Warning (message, builder.ToString (), false);
+                Log.Warning (msg, builder.ToString (), false);
             } else {
-                Log.Error ("Caught an exception", builder.ToString (), false);
+                Log.Error (msg, builder.ToString (), false);
             }
         }