TABLE: removed obsolete forward declaration.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
TEXT: implemented DXF_DEBUG macros.

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

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