Dump the function def of a macro or call block.

def macro_body(self, node, frame, children=None):
        """Dump the function def of a macro or call block."""
        frame = self.function_scoping(node, frame, children)
        # macros are delayed, they never require output checks
        frame.require_output_check = False
        args = frame.arguments
        # XXX: this is an ugly fix for the loop nesting bug
        # (tests.test_old_bugs.test_loop_call_bug).  This works around
        # a identifier nesting problem we have in general.  It's just more
        # likely to happen in loops which is why we work around it.  The
        # real solution would be "nonlocal" all the identifiers that are
        # leaking into a new python frame and might be used both unassigned
        # and assigned.
        if 'loop' in frame.identifiers.declared:
            args = args + ['l_loop=l_loop']
        self.writeline('def macro(%s):' % ', '.join(args), node)
        self.indent()
        self.buffer(frame)
        self.pull_locals(frame)
        self.blockvisit(node.body, frame)
        self.return_buffer_contents(frame)
        self.outdent()
        return frame