* In Hurricane::Viewer::Script::runFunction() & callFunction(), when the
script returns NULL, do not immediately return but first check if an
exception has been set. If so, print it *then* clear it.
Due to not clearing the exception we where seeing one later with
no relation to the true problem.
* In Oroshi/python/Rules.py, a bad test structure was discarting all the
"no layer rule with physical length" in the loading process. It was
blocked by the physical unit rule special cases.