Catching possible lack of karma

oarstats.py

@@ -84,7 +84,10 @@ def main():
         wall_time = int(tokens[0]) * 3600 + int(tokens[1]) * 60 + int(tokens[2])
         resources = int(re.search(resources_pattern, job_info["message"]).group(1))
         queue = re.search(queue_pattern, job_info["message"]).group(1)
+        try:
             karma = float(re.search(karma_pattern, job_info["message"]).group(1))
+        except AttributeError:
+            karma = 0.0
         devices = job_info["assigned_network_address"]
         gpu = re.search(gpu_pattern, job_info["properties"]) is not None
         job = Job(job_id, elapsed_time, wall_time, resources, devices, gpu, queue, karma)