Bug with projects when editing task work

change the folowing file: addons/project_timesheet/project_timesheet.py

def write(self, cr, uid, ids, vals, context=None):
...
#hack by wysi1 2010.01.15
        cr.execute("SELECT project_task.name FROM project_task_work , project_task WHERE project_task_work.task_id = project_task.id AND project_task_work.id = " + str(ids[0]))
        task_name = cr.fetchall()
...
if 'name' in vals:
                #vals_line['name'] = '%s: %s' % (tools.ustr(task.name), tools.ustr(vals['name']) or '/')
                #hack by wysi1 2010.01.15
                vals_line['name'] = '%s: %s' % (task_name[0][0], tools.ustr(vals['name']) or '/'
...