Fix for crash when cards.xml is missing a <pt> tag

[starstuffharvestingstarlight]

Found while testing with a recent cards.xml. Some cards were missing the node, set P/T to (0,0) when that's the case.

Example of the error:

looking at Cardboard Carapace
Traceback (most recent call last):
File "website.py", line 50, in
for n in root.findall("./cards/card")))
File "website.py", line 50, in
for n in root.findall("./cards/card")))
File "/home/h/build/mtg-card-scan/search_card.py", line 285, in from_xml_node
p_t = node.find('pt').text.split('/')
AttributeError: 'NoneType' object has no attribute 'text'

[YenTheFirst]

In this case, 'cardboard carapace' is not actually a creature, and shouldn't have a power/toughness at all. Allowing it to be treated as a creature will probably cause unforseen issues elsewhere. It's being treated as a creature because gatherer is listing its type as the antiquated "Enchant Creature".

My current fix for this is to ignore the Unhinged and Unglued cards, since they're poorly formatted. I'll double-check the exclusion.

[starstuffharvestingstarlight]

Good call, didn't trace the root cause of the error. Thanks!