(on master) fix: support ASCII encoding on input buffers
as of f19a9510, specifying ASCII (enc=22) results in NULL being returned from xmlAllocParserInputBuffer (because xmlLookupCharEncodingHandler
returns UNSUPPORTED (32) for ASCII.
as of f19a9510, specifying ASCII (enc=22) results in NULL being returned from xmlAllocParserInputBuffer (because xmlLookupCharEncodingHandler
returns UNSUPPORTED (32) for ASCII.