[FIX] openerp-web 6.1 - server action

how to reproduce:
 - install poweremail
 - install project_timesheet
 - go to project -> time tracking -> my timesheet
get
  File "/home/elbati/workspace/openerp/6.1/server/openerp/addons/poweremail/serveraction.py", line 73, in run
    obj = obj_pool.browse(cr, uid, context['active_id'], context=context)
KeyError: 'active_id'

serveraction.py

@@ -70,15 +70,16 @@ def run(self, cr, uid, ids, context=None):
 
         for action in self.browse(cr, uid, ids, context):
             obj_pool = self.pool.get(action.model_id.model)
-            obj = obj_pool.browse(cr, uid, context['active_id'], context=context)
             cxt = {
                 'context':context,
-                'object': obj,
                 'time':time,
                 'cr': cr,
                 'pool' : self.pool,
                 'uid' : uid
             }
+            if context.get('active_id', False):
+                obj = obj_pool.browse(cr, uid, context['active_id'], context=context)
+                cxt['object'] = obj
             expr = eval(str(action.condition), cxt)
             if not expr:
                 continue