HATCH: correction in type member description (Doxygen).

Signed-off-by: bert <bert.timmerman@xs4all.nl>
HATCH: removed dxf_hatch_pattern_def_lines_write_lowlevel().

Added dxf_hatch_pattern_def_lines_write().

Signed-off-by: bert <bert.timmerman@xs4all.nl>