[IGN-5231] jsonEncode issue

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In case others end up fighting this later and are having trouble finding the bad sub-elements of a bigger structure, this is a quick bit of debug code I put together to show the data types of a structure before passing it into jsonEncode:

def type_tree(element, prefix='/'):
    type_string = str(type(element))
    output_string = '{}={}\n'.format(prefix, type_string)
    if hasattr(element, '__iter__'):
        if hasattr(element, 'keys'):
            for key in element.keys():
                output_string = output_string + type_tree(element[key], '{}[{}]'.format(prefix, key))
        else:
            for x, val in enumerate(element):
                output_string = output_string + type_tree(val, '{}[{}]'.format(prefix, x))
    return output_string
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