base_classes.py: dispatch_hook: conf variable is undefined in the global scope (#228)

Fix `Raw` and `conf` undefined

scapy/base_classes.py

@@ -216,9 +216,9 @@ class Packet_metaclass(type):
             try:
                 cls = cls.dispatch_hook(*args, **kargs)
             except:
-                if conf.debug_dissector:
+                if config.conf.debug_dissector:
                     raise
-                cls = Raw
+                cls = config.conf.raw_layer
         i = cls.__new__(cls, cls.__name__, cls.__bases__, cls.__dict__)
         i.__init__(*args, **kargs)
         return i