TABLE: removed duplicate include.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
TABLE: added dxf_table_free().

Signed-off-by: bert <bert.timmerman@xs4all.nl>
Revert "TABLE: initialise pointers to symbol table entries."

This reverts commit 8520dfc5b15017677db18e9e155c9a274b99cd3c.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
TABLE: free members of the struct.

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