Rev4210, Fix format exception if no args

src/Config.py

@@ -13,7 +13,7 @@ class Config(object):
 
     def __init__(self, argv):
         self.version = "0.7.1"
-        self.rev = 4208
+        self.rev = 4210
         self.argv = argv
         self.action = None
         self.pending_changes = {}

src/Debug/Debug.py

@@ -15,7 +15,10 @@ class Notify(Exception):
 
 def formatExceptionMessage(err):
     err_type = err.__class__.__name__
-    err_message = str(err.args[-1])
+    if err.args:
+        err_message = err.args[-1]
+    else:
+        err_message = err.__str__()
     return "%s: %s" % (err_type, err_message)