snlite processing in infinite loop under multiple circumstances

Created by: zeffii

snlite is the node i use most, by far, and it appears it must be adapted to the newer update-system. It is too easy to enter an endless loop. This makes the node very hard to use if you aren't paying 100% attention at all times. I will try to address this asap.

one example

"""
in socketname 
out socket_out v
"""
print("hellow")

this should just end parsing, and never do any processing of the body-code if the directive was unparsable ( None, None, None, None).

There are several other directive issues, which I think would be solved if this most simple case can be fixed.