Bug: serd_reader_read_chunk does not support NQuads

[mcb5637]

The following code does not properly read NQuads (Graph is always null):

auto* r = serd_reader_new(...);
serd_reader_start_source_stream(...);
while (serd_reader_read_chunk(...) ...) {...};

(Reading a file directly via serd_reader_read_file_handle works, but reading via a simple adaptor from a c++ std::istream to serd_reader_read_chunk does not)

Possible cause: serd_reader_read_chunk calls read_statement which calls read_n3_statement direcly, without checking the readers syntax mode.

[drobilla]

Fixed in 4196ab792, thanks.

Please let me know if this is working as expected in your situation.

[mcb5637]

Yes, does work now. Thanks for the fast fix.