CvDEPTH() is 0 in a new thread, so duplicating pads beyond the always-present
first level is a waste of effort and memory.
-commit d5b1589c09b534ccfeb2eae26b3de9339c1bf22b
+commit d5b1589c09b534ccfeb2eae26b3de9339c1bf22b # NODOC
Author: Nicholas Clark <nick@ccl4.org>
Date: Wed Feb 10 09:57:23 2010 +0000