Workflow.py: fix a confusion between list/tuple of variable value to make...

Workflow.py: fix a confusion between list/tuple of variable value to make _executeMetaTrasition work.

product/ERP5Workflow/Document/Workflow.py

@@ -1003,13 +1003,13 @@ class Workflow(IdAsReferenceMixin("", "prefix"), XMLObject):
       raise WorkflowException, ('Destination state undefined: ' + new_state_id)
 
     # Update variables.
-    state_values = self.contentValues(portal_type='Variable')
+    state_values = self.getVariableValueList()
     if state_values is None:
       state_values = {}
 
     tdef_exprs = {}
     status = {}
-    for id, vdef in self.getVariableValueList():
+    for id, vdef in self.getVariableValueList().items():
       if not vdef.for_status:
         continue
       expr = None
@@ -1022,7 +1022,7 @@ class Workflow(IdAsReferenceMixin("", "prefix"), XMLObject):
         value = former_status[id]
       else:
         if vdef.default_expr is not None:
-          expr = vdef.default_expr
+          expr = Expression(vdef.default_expr)
         else:
           value = vdef.default_value
       if expr is not None: