Manually merge PR178 to handle a corner case with exceptions in output

rendering.

Credits to Alex Burke (albu-diku) for identifying and fixing it.


git-svn-id: svn+ssh://svn.code.sf.net/p/migrid/code/trunk@6199 b75ad72c-e7d7-11dd-a971-7dbc132099af

Author: jonasbardino

mig/shared/output.py

@@ -2832,10 +2832,11 @@ def format_output(
 
         # hide previous output
 
-        out_obj = []
-        out_obj.extend([{'object_type': 'error_text', 'text':
-                         'Validation error! %s' % val_msg},
-                        {'object_type': 'title', 'text': 'Validation error!'}])
+        out_obj = [
+            {'object_type': 'start'},
+            {'object_type': 'title', 'text': 'Validation error!'},
+            {'object_type': 'error_text', 'text': 'Validation error! %s' % val_msg},
+        ]
 
     start = None
     title = None