trivial: Add `addresses` field to generate-wire.py

It was failing the compile if we had a recent enough spec.

wire/tools/generate-wire.py

@@ -62,6 +62,9 @@ class Field(object):
         if fieldname.endswith('features'):
             return ('u8',1)
 
+        if fieldname == 'addresses':
+            return ('u8', 1)
+    
         # We translate signatures and pubkeys.
         if 'signature' in fieldname:
             return ('struct signature',64)