fix pbs dependency stuff

util/pbs/pbs.py:
    after -> afterok

--HG--
extra : convert_revision : ee0af716bcc0f83c4103632bd277a5680b0d2c23

util/pbs/pbs.py

@@ -158,7 +158,7 @@ class qsub:
             self.cmd.append('-q' + self.queue)
 
         if self.afterok:
-            self.cmd.append('-Wdepend=afterok:%s' % self.after)
+            self.cmd.append('-Wdepend=afterok:%s' % self.afterok)
 
         self.cmd.extend(args)
         self.script = script