generate-wire: handle variable-size arrays of unknown types.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

tools/generate-wire.py

@@ -241,6 +241,10 @@ class Message(object):
                 print('\t/*{} */'.format(c))
 
             if f.is_unknown:
+                if f.is_variable_size():
+                    print('\t*{} = fromwire_{}_array(ctx, &cursor, plen, {});'
+                      .format(f.name, basetype, f.lenvar))
+                else:
                     print('\t*{} = fromwire_{}(ctx, &cursor, plen);'
                           .format(f.name, basetype))
             elif f.is_padding():